Relationship problem—could you please assist your girl?

I met a guy on Hinge last year, and we've been chatting since December. We quickly became friends with benefits and even started sharing photos. Recently, he proposed to me, but I responded with, “Let’s meet first and see.” Despite my hesitations, he keeps pushing the idea that we’re dating now. The thing is, he doesn’t message me very often, and sometimes takes over six hours to respond, claiming he was busy. While I don’t see any signs of him being with someone else, I'm feeling uncertain. Most of our conversations happen at night, and when we do talk, he’s sweet and reassuring, insisting he wouldn’t cheat and that he wants to be the best partner for me. We have plans to meet this week, but I’m feeling conflicted. Should I wait until we meet to express my feelings, or should I bring up his erratic communication beforehand? Am I wasting my time, or is there something I'm overlooking?