Wow. I couldn't read your request, and the responses, and not respond myself. It amazed me that when I read your request you had *1* mom soley advocating breastfeeding and the rest had taken that advice (and maybe some they had received previously) very personally. The majority of us who encourage breastfeeding are NOT looking down upon those who don't, but rather want to spread the news about the great benefits. Ideally, we hope mothers will use what works for them and leave the rest, after being educated on the topic.
Anyway, I will be the first to tell you that breastfeeding is HARD, in so many aspects. I nursed my first daughter only until she was 7.5 months old. My 2nd daughter is just over 5 months old and it looks like we will last much longer this time around.
I don't think you are being selfish in any way by wanting to enjoy some time alone with your husband. The good news is, if you truly want to continue your breastfeeding relationshsip, it's completely doable. If you're worried about your baby not taking a bottle, switching to formula isn't going to help with that and could even make it harder of a transition. Know what I mean? My advice for this is to have someone else offer a bottle to your baby instead of you. You will probably even have to leave the room. Little ones can literally smell your milk if you're close by. It may take a few tries, but he'll get the hang of it. If he doesn't, you can offer it in a sippy cup or spoon feed it.
Can you pump your breastmilk? You can either use a pump or hand express. Hand expression might be the best if it's only for ocassional outings.
Also, if you plan on starting your baby on solids soon he will go longer between feedings and you won't have to feel rushed to get home.
You *can* successfully go between bottle and breast if you choose. Your supply may take a week or so to adjust, but it's all about supply/demand.
If you decide to wean completely, it's advisable to elminate 1 nursing session/day until you are no longer leaking, etc.
On a side note- yes, formula fed babies don't grow a third arm or anything, BUT they are sicker, are more apt to develop allergies and several other side effects (which are just being discovered) they wouldn't have by being breastfed.
In any case, it's ultimately up to you and your family. However, you said in your post that you "love" it, as does your baby. I hope something in my post encourages you to continue with your breastfeeding relationship since it appears you don't want it to end.
Good luck with your decision & and please send me a message if you would like more info on how to make this work for you!
ETA: LOL, I just wanted to add that I am NOT affiliated with La Leche League and am not supporting *their* views on the subject. I am simply stating facts, which I discovered through A LOT of researching. I don't take my role as a mother lightly and educate myself as much as I can on these sorts of things.