Shootin,
Just start doing stuff. If something sounds fun, do it! And if it actually is fun, guess what, it's a new hobby! Also, keep in mind that while we're emotional creatures, a lot of our evolutionary programming shows that we do need alone time. It's important to have a hobby that you can do without your significant other. You can't be with them 24/7, that's unhealthy imo. And that was an issue with my ex. She alienated most of her friends because she is needy and selfish. When they got tired of her bull, they moved on. Me however, I had an emotional attachment and addiction to this turd. So I hung around and helped her focus on her issues. She started seeing a therapist. I helped her pick out books to handle her craziness. The second she moves away, she seeks external validation elsewhere. My pain is really my own fault. I allowed her to treat me this way. Oh well, lesson learned. She'll never apologize, she'll never mean it, and she'll never love me in a healthy manner. She says she wants to be friends one day, if someone claims to love you and treats you this way, then how will they treat you if you are heir friend.
Eventually you'll get to a place where you realize it's best you never come into contact with her again. I hope that's soon, but it takes a lot of effort. For me, I truly believe that in my brain, but I'm still battling the pain in my heart. Today I was battling that pain of thinking we'll never make love again. But then, you just have to realize that her **** isn't that rare. It's funny, I was telling my buddy's girl this and she asks, "well was she that good." And I just start laughing. She was awful in fact. My count isn't exorbitantly high, and I can remember the 15ish girls I've been with. I can easily confirm that only one of them was worse than her for certain. Point being, we're attached. It's a drug. You'll heal. Put in the work and go through the rehab. Keep learning and reading. And that'll prepare you to face the next one better realize that you might naturally have an attachment mechanism that attracts the losers or users.