I need help!

[vampirepenguin1]

Ok, so I'm a 20-yr-old girl and I live with my fiancee. We've been together for 11 months now. We met on the internet last summer when I was living in New York with my family -- mom, sister, brother. After a few months, I realised that I had to be with this guy, so I moved to FL so we could be together.
Everything was fine at first. We got along good and had fun together. The only problem we really had was that his friends kinda annoyed me and he was ALWAYS on the computer.
Now, we've been together for 11 months and we've been fighting like crazy lately cause we've both been so depressed. He says that he hates himself and he's just a naturally unhappy person and nothing will probably ever change that. I've been depressed because he keeps saying those things and he won't stop talking about killing himself, plus I really miss my family and NY.
My fiancee mocks me when I get scared because I've recently developed a ghost phobia and I'm afraid of the dark. I want kids and he doesn't. He challenges my beliefs and we never spend any time together because his friend is always coming over to rant about one thing or another. Whenever we are alone together in our apartment, he's usually on his computer reading while I'm doing something else.
It also doesn't help that bad temper runs in my family, and whenever my fiancee says something about killing himself -- or sometimes he'll say something just to annoy me cause he likes to mess with me sometimes -- I get really upset and pinch him as hard as I can or sometimes I just break down and start crying and yelling.
I just really don't know what to do. Can you guys PLEASE help me?

[Horseyguy]

Pack your bags, buy a plane ticket to NY, get on the plane and don't look back

Really, do you need this crap in your life? He's emotionally blackmailing you with his suicide threats and if he would rather have a relationship with his computer than you then he doesn't deserve you.

[VincenzoG91]

Do not marry this guy. You're too young and incompatible. From now on, date locally and do not waste time on long-distance foolishness.

[MerryH]

This is where you went wrong:

We met on the internet last summer when I was living in New York with my family -- mom, sister, brother. After a few months, I realised that I had to be with this guy, so I moved to FL so we could be together.

Go home. Never do this kind of thing again. Learn how to deal with anger without resorting to yelling and physical abuse. Call your mother.