Just seeking opinions on whether these personality traits could make my boyfriend a candidate for bi-polar. He is increasingly hard to deal with, and I'm starting to see trends and cycles that make me think it's quite possible he is mentally ill. We have lived together for a year and a half.

--On a daily basis, he is upbeat, outgoing, charismatic, sweet, kind. He flirts with me, we have a healthy sex life, great conversations, and I can tell he's content/happy.

--About every six weeks he falls into a depression, usually sparked by some small erroneous detail. These slumps last anywhere from one to seven days. Usually we nearly break up during these, because he "doesn't know what he wants", "doesn't see a future" with me, and "feels trapped." This usually results in me becoming an emotional wreck, but giving him the opportunity to call it off if he wants to, i.e. "i can move in with so-and-so if you really want me to move out" and "are you sure this is what you want?" Usually this is met with a lot of uncertainty. He says he loves me but he's not happy, however this "unhappiness" is never apparent on a day to day basis. Sometimes these are caused by him bringing up issues from the past that were never a big deal at the time, only in hindsight. Example includes a friend I had to write off because the friend called my boyfriend boring. This was two years ago and he still wants to fight the (male) friend, and still gets upset with me for saying it wasn't a big deal.

--Along those lines, in arguments, everything is my fault. I'm to blame for many, many things that I think are over-exaggerative. I rarely get mad myself, but when I do, he refuses to take responsibility for why I am mad and blames it on me overreacting. He never apologizes.

--Binge drinks. On average he only drinks on Friday nights, occasionally once or twice more during the week, occasionally not for weeks at a time. But when he drinks he DRINKS and doesn't know when to stop. I mean like asking for another shot at last call when he's already in bad shape. This usually results in him blacking out, falling over, passing out, etc.

--Flys off the handle about seemingly small issues. Temper more evident if drinking is involved. Has punched a brick wall, a glass of water (shattered), and our refrigerator in the past year. Doesn't yell or get physical with me in any way, just clams up and won't speak to me. I never really know what to expect. Sometimes he'll be mad for days over something small like forgetting to lock the door, or sometimes will be over it before I know it. When I share with friends the things he gets upset about the usual response is "are you serious?" Things I personally would shrug off he clings to as major events.

--Sleeping patterns: naps constantly. He sleeps very, very deeply to the point where I'm unable to wake him up at all. Occasionally will stay out late even when he has to get up in a few hours for work.

--Very bad about remembering to pay bills.

--Watches the same movies over and over. Every day for a week, often, and while sleeping. He will usually move on to another movie and have the same routine, but always comes back to old favorites.

--Thinks he needs to lose weight, but is 5'7" and 145 pounds. Very slim and petite and in no way overweight. Active lifestyle, outside of napping/drinking/watching movies, his other hobby is mountain biking up to five times a week.

--Refuses to see a doctor for any medical issue, including a dentist or eye doctor (wears glasses) neither of which he's seen in at least four years. He's admitted to having issues, but says therapy or medication is out of the question.

So, any thoughts? Sound like classic bi-polar or am I trying to make excuses for him being a jerk? And even if he is, any advice on how to get him to see a doctor about it?