Should I tell him how I feel?

Should I (25/f) tell him (32/m) how I feel?

I went on 4 dates with a guy and fell hard. Oct-Nov - then we still kinda chatted up until mid dec.

I really liked him but called it off when I was overly anxious and jumped the gun (I was becoming more and more attached and noticed he was off (distant) the last date more so than the first so stupidly called it off.

He said that it was clear I needed a relationship but for him he needs more time to figure out if he needs one.

I regretted what I did and couldn't face it so suggested staying FWB. He kind of politely dismissed it.

We stopped talking for a while and I realised I really missed how fun our dates were etc. I suggested being friends. He agreed, added me on social media and invited me to his gym to work out on 27/01.

We worked out together. He started to flirt with a girl in front of me at the gym and I just realised I wasn't over my feelings and couldn't be friends.

We left the gym, hugged & he suggested we do something more social next time as the gym was busy.

I don't want to feel like shit being around him & don't want to be a weird creep and use the friends things as a way to get close to him.

He hasn't messaged me since so I really think he's not interested. I just do not know how to get over him. Should I tell him I can't be friends? Or just ghost? Do I tell him I actually really like him (although I don't want to give him a huge ego and face being rejected again) :(