Relationship Conundrum

Hey guys I would like to ask for a little help about my current situation. I met this girl a few weeks back from a friend of mine. After a few weeks of talking and going on what are pretty much considered dates we hooked up a few days ago. Sounds basic so far right? Simple formula, but I having real torn issues about this woman.

Background info (in case you wanna know): Have been in 3 serious relationships spanning from high school to college; each was very intimate and were all fairly long term (shortest 1 year, longest almost 3 years). Each time we said it was love, and I honestly put 100% in all of the relationships. I'm very exclusive with my relationships that it always ends up pushing friends aside for that woman, which I slowly but gradually end up regretting doing so.

My dating formula as I look back basically went like this:
1) Get to know her
2) DO something intimate to start dating
3) Date for months being somewhat happy
4) Realize I lost my social life along the way because I put my entire focus on this one woman
4) I end up cracking and breaking up with her
5) Regret that action because of so much investment in relationship , get back together with them
6) Few months later Woman ends the relationship

Because of my past relationships and similar formulas of how each one ended, I don't want to repeat the same mistake. So I've distanced my self emotionally from this woman. Actions and choices I would normally take with a woman I like I now hesitate with. But that's just a part of it, the next part is kinda messed up. Because of my roller coaster of love 3 times and all a year or 2 apart, I've just become emotionally drained with women.

It's been 3 years since my last relationship, which was also my first sexual partner. I hadn't really put effort in finding a woman since then. Then this woman starts taking an interests in me.. My initial reaction is like "well it's been a long time, might as well see where this goes." And we have had some good conversations.. but the more I know about the woman the less common ground I have with her,which really tears me up with what I think about her. My past relationships always had strong common grounds with me. It's just different experience.

Like I said we hooked up a few days ago but still haven't made anything official and it hasn't been really serious. And now I have fear about repeating what I've done with my past relationships and I almost want to call the whole thing off. It's still fresh so I feel like I might have a chance to break it off without huge repercussions... But I can't find a big reason not too, and honestly I enjoy the attention because it's been so long.

Any advice for a situation like this?