<human>: Could you distill the essence of the text into 1-3 sentences?

Literally just happened 15 minutes ago. I feel so lost; I've never broken up this hard before. We met when we were 14, and have been together till now.

I noticed that her energy had been quite low the past couple of weeks; she seemed to be having a lot more fun with her coworkers than she did with me. We'd usually have sex when she comes over, but there was just nothing there yesterday. She also took me out to lunch today, but her face was blank as fuck. Felt like it was a chore seeing me. 

These circumstances were so irking that I decided to call her and ask about it. She starts crying, and I almost do too. She tells me that if another woman were to chat me up, she wouldn't feel jealous anymore. We talk about how much of a learning experience it's been, and thank each other (the conversation wasn't as formal as it sounds here). She asks how I feel about our relationship; I say it's probably a good idea to break up, and she agrees.

I tried. I was a tough love kinda guy. I wanted ALL the best for her and I encouraged growth in every aspect of her life, albeit sternly. She was sweet and ingenuous; I guess my austerity drove her away. I have NEVER abused her. I love her so, but I feel this relationship cannot be salvaged. She's lost feelings; I brought this upon myself

For the duration of our relationship, I didn't party 'cause she didn't like it. I shunned my own friends to the point where they stopped calling me out to chill. Should I hit them up and rave my problems away?

Any tips/insight/advice would be much obliged. It's a shitty feeling, and I really don't want to sit around and ruminate.
<bot>: gf loses feelings, we chat about it over the phone and agree to break up, how do I cope? Should I go out and get shitfaced?