I’m ready to move on

I’ve been having this “thing” with a guy I met 3 years ago in college. I asked him if after we graduated & had our life more together he’d want to make it official and he said yes. Well we graduated, but hasn’t brought it up. Sometimes he talks to me all day, other days he replies maybe once or twice. I’m tired of the inconsistency and I want to move on but it’s so hard. So I’m here to hopefully get some reassurance. I should move on right? I deserve better? I can do it?