17 and pregnant AND IN NEED OF HELP

Im 17 and I am pregnant but the father of the baby has been telling me how he's falling out of love with me and doesn't think we are meant to work out. I am so crazy in love with him but he seems done with me. I make shit so much more complicated for him in life. We've been together for almost 7 months and I haven't told him im pregnant yet. Do I tell him? When? How do i tell him? PLEASE I NEED ADVICE