I used to have that problem for a while up until last year. That's when it got replaced with depression not stemming from that, but problems my drinking & substance abuse caused around me & in my life. I'm not saying you have an addiction, especially since I quit cold turkey myself last year. However I can say I was bored, very bored with my life. I liked going out & getting sloshed. I sat around & drank at home, because I was bored. What I was bored of what was my life. Some people though of me as a party guy, but I kept getting more & more bored all the time even though some people thought I had a fun life--it wasn't. Not to mention people in the music scene or that came to it around me had become addicts. The one thing I saw that I liked though was seeing friends of mine in recent years, who got married & started having kids. They seemed to be really happy even though they weren't getting out as much. Things like entertainment, art & culture I found weren't really giving me the joy I thought they would, so ideas I had about getting into it & having fun with it wasn't having the same appeal as it used to. I found for all the knowledge there is, all the material things there's to gain or have, all the money to have, all the career goals there is to achieve--I found those things didn't really make a person feel complete. Even though there's things out there I do want to do in science now, even if I ever got a nobel prize, invented something great, came up with a cure, or wrote great books, no matter even when something is a career I'd enjoy working at, it still doesn't take care of an empty place. Having lots of friends is nice, but having really good friends to talk to is even better. As good as that is though, I have to admit when a person has someone special in their life, it's a lot better. I don't want to sound preachy, but feeling God might help eventually, helped me to get through things even though I was angry with God too. Someone also in a the last couple of months made me feel a lot better, where others couldn't so much. It also helps to rethink about what you want to do & if it's really what you want to do. Also a career will never replace people who a person cares about no matter what is said by some. It's good to have a life away from just a career & got to not just have fun or getting a bit enebriated. I'd say fill the empty bored part of your life--I could say with God, but I'm not trying to be preachy, but besides that I recommend finding someone special for you to meet & just going to bars isn't where to meet people like that either especially since a lot of people by last call are a bunch enebriated by then. Find some nice people to meet, who you might have things in common with about things you enjoy & just talking about music & technical science details isn't enough either. I'd say someone for you to watch tv with. I know you said things about being alone, but sometimes that's because possibly is there a possiblity that you don't have people around talking about things you want to talk about. Perhaps meeting new friends that understand you on a deeper or personal level better will help. Perhaps you're more grown up mentally than some people you see everyday. So meeting some friends who relate better on your level might help. A lot more people have gone the same thing, but some people sadly never address the issue. I waited too long & it got me in a world of crap that I'm still dealing with the afteraffects of, besides trying to repair the damage. In other words a lot of people who haven't addressed this are existing as zombies as far as a life goes. Drinks, substances never fixed that for me, it just made me lose track of problems to fix off & on, & I lost time while it wasn't getting addressed. Sometimes you gotta just say **** that, this is boring. Watching movies for example is always better with someone. Find some people to laugh with too. God helps too.