Dear D.,
I wish you and your boyfriend much happiness in your upcoming marriage.
My advice for handling your son would be for your boyfriend not to try to take a parental role until after you are married. It is very hard for children to respond to someone new in their life that is trying to take on a parental role, even if it is with your good wishes. Although you may be very serious about this man, 3 months is a short period of time to introduce him as a parental figure in a 4 year olds life. Quite honestly, if this man truly adores your son, he will not have a problem having patience with him and understand that to the child he is a "new" figure and the child may not yet accept him as a parental figure.
As with most children, "asking" them to do something will never get the same results as when you actually take them in and do the chore with them. You may start by helping them and doing most of the work yourself and gradually having the child do more of it with your supervision. As time goes on and maybe only a few times later, the child may do what he's asked easily or without being asked. It is also very important to give them positive reinforcement as they do the chore you are requesting, while at the same time instilling in them that this chore is necessary and something that is expected on a regular basis. You must have a good balance and it is something a child must learn to do. As we all know, learning is a process. Children don't usually respond well to instuctions, if it is something they have not already been worked with, through the process.
When, it comes to eating, there are so many factors involved. Is the child one that generally eats a good meal? Has the child had any snacks or other things to eat in the few few hours before he is being given this meal, so that he truly isn't hungry? Is it something he truly does not like. Do you make sure that the meal you are serving has at least a few nutritious things that your child does like, so that if he eats most of those, he can get by with a bite or two of the rest. Children under the age of about 10-12 have very sensitive tastes and things that we like or love, can often be very offensive to a child . Again, it may be that your boyfriend is new on the scene and your son doesn't see him as a parental figure, even though you may have told your son he needs to listen to this man.
Until, you are actually married and this man is actually in a parental situation, it would be best for you to continue the parental role for your childs own need for security in his family life, which up to now has been you and him. Adding another adult without a warmup period is hard for a child to understand, even when we explain it to them. They may be very smart, but this is something that goes beyond mental and is more an emotional adjustment.
You and your boyfriend have plenty of time ahead of you, but your son will only be young for a very short time. Patience, love and understanding of his feelings, as well as providing a healthy and emotionally secure lifestyle for him, is an opportunity you only get this 1 time and if you put your own feelings ahead of the childs and rush him into a relationship that he doesn't understand or isn't comfrtable with, will not be an easy transition for him. Just imagine how you would feel if all of a sudden you had to respond to directions from someone that you may see as a new friend, but have not previously known as a parental authority in your world. It is not an easy thing to accept.
After you have gone through a dating period and your son starts seeing a trustful and respectful relationship between you and your boyfriend, he will start understanding that your boyfriend/husband is someone that cares for you and him and is someone that respects him and will be protecttive of him and he will come around.
If you stick to being the one that gives instruction and your boyfriend gives your position in your sons life respect, then as time goes on, he will be able to share in that role as well and it will be an easier adjustment for your son. It won't and shouldn't happen over night or even in a week or two. It should be a gradual transition so that it is one that appears normal to your son.
I am speaking from experience. I had a very similar situation and after seeking help in several directions, I found this to be the one that put stability and respect into my "new" family sitution. It also made the relationship between my new husband and I much better. I was the "original parent" and he respected that. He would back me up and as time went on, there were times when he dealt with things and I was never told, in order to build trust with my 2 sons. They were cases where telling me would only upset me and not change the situation. So as long as the boys corrected their action or made good on reasonable promise, I didn't have to be told and my husband was teaching the boys that they could trust him to help them and not always punish them. I was saved the anguish of knowing what had happened and they learned to turn to my husband from time to time, when they needed help or advice and also learned to turn to him when they wanted to share something they were excited about or was important to them. We grew to be a complete family where we could turn to one another. When 1 boy got in trouble we all handled the situation together. That even meant a trip to the firestation together and one to the police station together. It had a lasting impact.
After a while, my husband was able to relieve much of the stress that is placed on a single parent. But, until the boys were comfortable, he backed up my decisions, quietly and respectfully. It was very different than the way I was raised and so much easier. We became a FAMILY. He never tried to be a domineering husband or father. He respected the right of the boys natural father, but since we lived in a different state, was there to be the "father" whenever he was needed or asked. He did not push the sitution, so it came naturally.
I know this is long-winded, but I hope I've helped some.
Jamie L