Losing feelings?

Has anyone else felt this about their SO?

My ex and I have started dating again since March of this year. At first I felt strong feelings for him and all but recently I’ve been feeling apathetic and indifferent. Idk if it’s period hormones or what.

Today we went on a date and fooled around in the car but I just couldn’t perform. I didn’t want to suck his dick or do anything else at that moment. I find him attractive though.

I just didn’t feel anything towards him today. He felt like more of a friend. The other thing is that he doesn’t like to hold hands in public and I do.

Idk what to do. He’s into me but I feel lukewarm and I feel so bad and guilty :/ should I wait until I say anything or talk to him about it? I’m afraid of what he’ll say 😣