He was crying on webcam!

You can't allow him to emotionally blackmail you into staying with him. If he threatens to cut himself or harm himself then he needs to seek medical help. You should insist he seeks professional help if he wants to stay in contact with you.

Did he put the webcam on to show you he was upset?
To be fair, if that was the case, maybe he may be treading the "obsession" line just a tad. I can symathise with him to a point - he's obviously heartbroken, but seriously, would you guilt-trip somebody into staying with you?

I hope it turns out ok for you both.

Yeah he does know the reason that I'm staying with him is because I feel sorry for him, but then he denies this sometimes and says that I love him and that I'm actually lying He says that he'll wait for me forever to love him like he loves me and I was on msn a while ago and I said I'm busy I have to go but now he keeps ringing me but I'm not answering his calls. The fact that he's calling me 3-4 times everyday is really freaking me out and if something happens, like I don't say bye when I'm signing out then he texts me and calls me like mad and says that he thinks something bad has happened to me and he got really worried.

You can't allow him to emotionally blackmail you into staying with him. If he threatens to cut himself or harm himself then he needs to seek medical help. You should insist he seeks professional help if he wants to stay in contact with you.

That seals it, he's definitely a creepy, obsessive, stalking, loser. I mean, it is sometimes annoying when people don't say bye or anything when they sign out, as you don't know if they got cut off and are therefore coming back, but most people have better things to do than text and ring like mad that person, and would realise that it looks incredibly stalkerish. He obviously realises that your relationship is hanging by a thread, and that's why he's getting so paranoid when you don't say bye and stuff. He's not worried something's happened to you, he's worried that you're angry/fed up with him, and just wants acknowledgement and reassurance. He needs someone that he doesn't feel is better than him, so he can be relaxed and comfortable with. He obviously knows you're way too good for him and is afraid you're gonna realise and leave him..... which is exactly what's happening.

Yeah he kept insisting to put the webcam on when we were arguing but I kept saying no no no but he said one last time, so I said ok and all I see is him crying like mad and I was in absolute shock.