5 here. Your situation sounds a lot like an online relationship I had once..we ended up getting into huge arguments over the stupidest things, I had to break it off for the sake of both of us staying sane. I know how you feel about messaging and never getting an answer, too, I've got a few 'friends' on AIM/MSN who do that, ugh. You're not pathetic, don't even think that..it happens. You just gotta' get over it and move on as I did...and I admit it wasn't easy, and half of it was my fault to begin with.
Also: I don't mind sharing my IM info over Email if you want someone to talk to/a new friend, and it'd be nice to have someone to practice Japanese with, besides. Ever since I graduated it's been slowly vanishing, blah. Good luck on your midterm, I have an Oblivion mod due for my final project today, myself.