My kids are 10 years apart. I certainly never planned it that way, but it's just the way it happened. I wouldn't change a single thing.
My sister and I were only 3 years apart. That meant, for my mom, that both of her daughters were out in the world on their own in a very short span of time. She didn't feel ready for that.
I wasn't ready for my 17 year old daughter to graduate high school, but that's how it worked. Thankfully, God knew what he was doing giving me a kid 10 years later because I wasn't ready to have no kids at home. My son is my joy and I couldn't be happier to still have had a little kid in the house.
Now, my son is 17 and will graduate in June. I'm in no hurry for him to move out either.
My point is that some people want their kids close together. Nothing wrong with that. But, they also grow up and tend to leave home at the same times together. I'm glad my kids were spaced out. My daughter is 26 and has a baby of her own while my 17 year old is still home with me. I like that.
My daughter thought of my son as "her" baby. She adored him. They didn't compete on the same levels for anything. My son adored his sister and looked up to her. They have a very close relationship in spite of the age difference.
My sister and I were close in age. That's all we knew. My own children were far apart in age and that's all THEY knew.
It is what it is.
Perhaps quit trying too hard. Don't let "pressure" get the best of you.
Relax and let what happens, happen.
Best wishes.