I’m sorry dude, that sucks. I’ve been in similar places as you are now, myself, and it’s not fun. A couple years ago (I was gonna say “recently” but it’s been two years already, jeez) I was dumped by a girl I waited for for many years, who I was sure I was going to marry, who was the woman of my dreams, and I thought it was the end of my world at the time. I had days where it was like my heart was decaying from the inside. Days I didn’t want to get out of bed. Days I was a despondent prick. Days I questioned everything. So I get where you’re coming from, more or less, and I empathize.
I dunno if you want advice, but I like to give it so here goes (;P): I know it’s cliched, but you just have to keep moving forward. You have to keep working on yourself and your life and your art and your career and getting out of bed every day and putting one foot in front of the other and just keep moving. You can’t squander yourself and your talents and your potential by pining: this is something I also had to learn.
I’ll give my standard advice, too: Take lots of long walks, listen to some good music (I recommend classical, but anything as long as it’s not depressing), and just get right with yourself. Take up the gym, work it out in writing or music or art, find someone to really talk to (even if its a professional), but don’t try to drown it in substances or booze or whatever depressant coping mechanism.
Either way, please don’t do anything rash, man. There are people who love and care about you, and you have a lot more music to make. You’re a talented guy, so throw yourself into what you love and what you need to progress yourself. You’re stronger than you think.
I, for one, value your input here on OT.com, and I’m sure others feel the same. You seem to me like a cool, talented guy, and a decent person. Keep fighting and keep moving forward.