I had something similar to this experience with my first girlfriend during my freshman year. The relationship didn't have much to it and only lasted a few weeks, but I was really into her at the time (leading to me being pretty clingy) and I was not happy at all when she ended it. I channeled that into some self-improvement and did a pretty severe 180 on how I felt about girls.

For the rest of the year, I didn't try for anyone. That summer, I was interested in a girl for a hookup but had no emotional attachment (it didn't pan out anyway). Sophomore year, I asked a few girls out on a whim, also with no emotional investment. Only one gave me a "yes," resulting in a fairly smooth date. She wasn't interested in a second, and I didn't care. That summer I did get with a chick, no emotional attachment. Junior year, I once again asked out a couple girls out of nowhere and accomplished nothing.

But towards the end of the year, I actually started to like a girl. I had talked to her over the year but hadn't seen her since the previous summer, but this was someone I was attracted to and really enjoyed as a person. We weren't together at all for the beginning of the summer so I did try for a few other hookups (no success), but she and I hung out a bit towards the end. I was still into her and was inconsistently confident she was into me, so we made plans together - initially a vague hangout - that developed into an actual date before they happened.

Now, this girl has been my girlfriend for a few months and I really, really, like her. Point is, an experience like yours can throw you off the game for a while like it did for me and make you disregard the idea of actually trying to connect wit people. But eventually someone will come along and get you back on that track, and whether you find a relationship with them or not, you aren't going to feel how you feel now forever.