Afraid to stay and afraid to go.

I have a choice to make, and it's one that is incredibly difficult to me. I have been seeing someone I met online and things got very physical very quickly, but I don't know if I like them emotionally or mentally. Then there is my now ex-girlfriend who regrets breaking up with me and wants to see me again. There is also a third party, but currently only a friend, who I would like to pursue and makes me feel like a teenager again.

I don't know what to do or where to go and I can't make an omelette without cracking a few eggs.

Personally, I'd probably err away from the ex. They became an ex for a reason, and sometimes it's better to allow the past to be the past.

If things got too physical, too fast, with the person you are seeing now, before you'd decided whether you actually like them emotionally or mentally, is there a remote chance of liking them that deeply?

And with the friend that leaves you feeling like a teenager, again, is there a chance there?

I'm really not sure on either front. I would ultimately enjoy a more personal relationship with either, but I know I cannot choose both.

One is more physically stimulating and affectionate while the other is more intellectually approachable and shares more similar interests and ideals.

Also the one that makes me feel giddy is someone I crushed on in high school but never approached until now.