The_Guerrilla_Sodomite saidI have to disagree with you guys [Tanker & cal] just a little bit. It can work given the right personalities.
I dated a guy for about a year and a half while he was in school. I had my own place, but I was always at his. We were perfectly happy just quietly being in the same room with each other as he studied while I read recreationally. I'd go to the gym, come back, fix him dinner, we'd fool around and he'd study again while I read. Then we'd go to bed, fuck like crazed weasels, wake up the next morning and repeat.
I was about to post a similar thought -- it depends on the guys. One couple might find maintaining a relationship is a burden on one or both of them, another couple might experience no drawbacks, while yet a third does better as a team than as separate individuals.
I've always looked for the team kind of relationship, and believe I do better with the right guy at my side than without him. And I hope that's been his mutual feeling, too.
But I can understand circumstances, perhaps like schooling, where a guy's gotta pretty much be doing it on his own and totally focused at times. There a BF can function as a general helpmate, taking on some of the extracurricular burdens, like domestic chores, doing errands, and even just providing supportive companionship & encouragement.
But the same circumstances can make having a demanding & needy BF a distraction & hindrance. Someone you might otherwise tolerate in better times because of other positive qualities he has, but whom you can't indulge when he's dragging you down, and taking more from your life right now than you can afford to be giving up.