Is it normal that i'm considered a tough guy and i'm shy with girls?

This is something really weird about myself.
I'm a boxer,a psychonaut,I'm that ''brave and crazy'' guy.
I'm that guy that would fuck almost any living being.

And I had only 1 girlfriend until now and I kissed her only once because of a pathetic shame-like embarrassment that I don't know when and how it got triggered.

So,long story short,I'm no longer a virgin,I fucked few whores before without being nervous at all,but I can't have a girlfriend,can't kiss her,can't show or tell her that I love her,can't do anything romantic to her.

When I was with my single girlfriend...I had no remorse at grabbing her hand and rubbing my cock with her hand or sticking my cock between her butt cheeks when she wore yoga pants.

I'm not embarrassed for doing anything sexual to girls but
I'm greatly embarrassed by showing to girls that I like them by doing romantic things to them.

I'm simply not that guy...but I want to change because in this style I will not have a girlfriend in the near future.

What is wrong with me? How can I change?