Saluting with misty eyes
I'm not gonna give you that same old, tired line about everything is going to be, and yada-yada-woof-woof... Right now, things suck, however, you have dealt with the some of the worst you are ever going to deal with (childbirth, and the first year... not to mention the pregnancy) and have made it out the other side clean. None of this other garbage can actually touch you.
As far as your boyfriend goes, he's a man, right??? We're all... uh... bodyparts on the lower, back end of the body. It's the way we're built. If it's not beer, sports, or sex, we aren't interested, and it tends to aggrevate us, right?? He'll get over it. Just give him PLENTY of space (like don't talk to him) and he'll get over it.
I can also promise you tht with a bit of love, understanding, and a great amount of firmness, kids eventually grow out of that stage (until they hit 13).
Keep writing, and I really do suspect you'll get the answers you need.
Imagine all the People living life in peace...