The good guy

I’m talking to a guy that would be considered the “good guy”. He pretty much treats me amazing and does a lot for me but the one thing is that I’m not sexually attracted to him. Has anyone been in this situation and the guy grew on you or should I just tell him I only want to be friends? Should I at least try to have sex with him first? Sex life is important to me and I want the attraction to be there but I’m just not feeling it. Everything else is great. We have a lot in common and we think a lot alike.