He and I

He and I are very much in love. We couldn't be happier with each other and how things are going. Our story makes everyone go Aww. We're best friends, he says even when I hate him and I'm with someone else he'll still be there for me. I love him so much I couldn't bear the pain of us breaking up but I can't help to face a reality that we may eventually breakup because he has an established home that I could never ask him to leave he's coparenting in the same home with his child's mother. Which is fine I'm not jealous coincidentally my father did the same with my mum, so it's okay with me, but eventually I would like to get married and have kids and have a stable home and he isn't interested in that, he makes jokes about me having another boyfriend (I talked to him about how I felt about that joke and it's resolved) and I can't help but think about that we have a sort of expiration date. I am just wasting my time or allow myself to be happy with our relationship.