Coping not having more babies

Molly

So we have two girls together, and we aren't planning on having anymore at this time. He has a son with someone else and his mother won't let us get involved, and even if she did, his son is 14 hours away. I'm totally happy with our girls, they are more then enough. However I do feel kinda sad I will never have a Mama's boy. My boyfriend said we could talk about having another in like 10 years but I can't imagine having to start all over again. I wanted my kids young so I could have still be young enough to live life after kids, and to be around longer for potential grandkids. Has anyone ever felt this way? How do you cope?