I recently met this new guy after getting out of a relationship. He's a great guy and we have a good vibe together while talking for hours and he was also telling me he can prove himself in the bedroom as a great bed partner. So I decided to jump the gun and have him show me later that day but after 3-4 rounds of me getting to orgasm, he just couldn't perform. When he did get hard enough to fuck me, I couldn't really feel anything down there either. I wanted to help him feel good and help him cum too but nothing I did helped much. Eventually he just ended up jacking himself off next to me to cum and I felt like I was there for decoration.

I don't want to size shame but my favorite part of sex is the insertion and I didn't get that with him besides his fingers. I feel bad about not being able to make him cum as well as it seems that we're not compatible sexually after telling him that we could be fwb. Should I give him one more try to see if he could really deliver what he promised me or should I just flat out tell him that fwb isn't a good thing for us and we should just be friends?

Tldr: Sex with potential fwb isn't good enough for me, should I give him one more chance or just straight up ask to just be friends?