Feeling no hope😞

I’ve been wanting baby number two for awhile now. Boyfriends parents keep asking if we are going to have a baby, and we don’t pull out ever and do it the baby dance a lot. I am getting a bit depressed seeing everyone having there second kid and I have a 4 year old, from a different relationship. I want to give her a sibling but it seems it’s not going to happen and it sucks cause I feel he’s the man I’ll marry & I’m going to let him and his parents down ☹️