In My Feelings 😔

I honestly feel as if my boyfriend is never going to propose. We've been together for 7 years now, we have 3 beautiful kids and whenever anybody ask us when we're getting married he just says "eventually" or "that's the plan" but I'm not feeling like it's going to happen. When we first got together we talked about it and it seemed like something he wanted but now it doesn't. When I asked where he sees us in 5 years he responds with "idk". It's just very upsetting.