Dude I know exactly what your saying and here was my solution to the problem you are facing. First of all recognize a fundamental truth about LTRs: unless you marry the girl 99.99% of them will turn out bad. When you walk into one of them appreciate it for what it is, consider whether you really want to be with the girl, have your fun for a while and then move on. I know this sounds really hard because attachment is serious but when you walk into the relationship expecting it to end bad you expect it so its not that hard.
That being said, attachment is awsome...relationships beat random hookups by a longshot. One time, maybe get into a long term relationship with the expectations I laid out. You may get hurt, it may end with a week of you staying home and crying, You may send her creepy txts for weeks trying to get back together with her when it ends, but its a great learning experience: you'll know yourself a lot better after you try.
I say this from experience because I was exactly like you (except I only got 25 girls before I got into an LTR haha), then I got into an LTR and got pretty hurt. Honestly though, it was worth it. The LTR was better than the 25 combined and in the end I was so much tougher, so much readier to deal with the world, and I understood myself so much better. We turned out being the .01% because I learned to deal with my emotions, and was able to get over her. We're still friends and sometimes a drunken hookup will happen between us haha.
Hope that helps you a little dude, and don't stress about finding an LTR it will find you if you're open to it and getting with a lot of women, which it seems like you are
-Fiery Check out my blog: http://fierypickup.blogspot.com/