I have been thinking about suicide from an early age, so I can relate to what you are saying. Pain is always there, in the background at least, but there are some things in life worth experiencing. I enjoyed my first year at college, I met a lot of people and my perspective really changed, at least for a while. You mentioned that you have a friend, so you have the capability to get close to people and form lasting relationships - that skill can come in handy at college. I don't want to nag you with stories about life being sunshine and rainbows, but I would feel like crap if I didn't at least try to make you see things from a different perspective. I think it would be a shame if you missed out on some experiences that might be pleasant for you and that might build your character and shape you into a better, stronger person, an upgraded version of your current self. Obviously, the decision is yours, and I do not know your whole story, but believe me, nothing is set in stone at 18. You have enough time to find ways to cope with pain and make something meaningful out of it.