Feeling unloved

Hey I think I’m probably over reacting but my bf has just told me that he doesn’t want anymore kids he has a 14 yo son I don’t have kids. Also he won’t discuss getting a house together or take down his single status on Facebook I know it sounds petty but it means something to me. I have told him how I feel about it and he just keeps asking me to leave it alone. Am I making mountains out of mole hills. We have been together a year and a half and last summer we were actually trying for a baby. I’m loosing my mind and I just can’t be ok with knowing I’m never going to be a mum. I love my stepson to bits he is an absolute stunning and kind kid he really is. Is it really that bad that I want one of my own. I’m 36 and I just feel like time is running out for me