<human>: Can you summarize the given text in a few sentences?

So, I've been with this girl ever since my Junior year in high school. She was the first girl that I ever dated and for the first year or so everything was going great. But, that did not last for a very long time as when she went to college, I was stuck in my senior year of high school feeling guilty for talking with people who weren't my girlfriend. So when I went up to see her at school, I broke up with her. Maybe not the smartest way to go about my problems but it's what happened.

Fast forward a couple months and we're back together again through mutual feelings resurfacing. I decided to go to the same school as her due to personal choices and a little bit of wanting to be with her. However, being a freshman in college all you want to do is be a shit head and party and all that. So, you guessed it, we broke up. This time on more mutual terms but still there was a feeling of something being unfinished. We inevitably got back together.

I'm going to spare you the details of every single break up and make-up since then because there's an embarrassing amount of times that we have broken up. Now, just recently my feelings for her have diminished in a way that hasn't happened before. The sex doesn't interest me, I do things to avoid her, and she just doesn't really make me happy like she used to. I feel selfish for saying these things but it's the truth.

Now, my question and advice I'm seeking is how exactly I can end this toxic relationship. One other important piece of information is that my girlfriend is now deeply intertwined with my friend group and I can't talk to anyone about it without it becoming personal. I care about this girl, I just feel like it's dishonest that I'm with her and have lost feelings almost entirely.
<bot>: Been with girl since high school. Lots of break ups have happened but we're still together. How do I end the cycle with class?