WHY DOES MY FIANCE HURT ME AND ISOLATE HIMSELF???

When my fiancé (well I guess ex-fiance now) and I first started seeing each other, it was great, He was very kind, attentive and it was like this is too good to be true....and guess what???  IT WAS!!!!!!!!!!!!

This has been torture.  The  mood swings, him saying such hurtful things to me (cursing at me), not caring how I feel about anything, blaming me for everything (telling me I need to see someone you have a problem), saying leave me  alone, I want to become a hermit to calling me and asking me to come over, we have a nice dinner, ride out then his moods change again, leave me alone, why are you bothering me, just let me, I can be alone if I want to?  It ask has if he's perfect. He's also parnoid. We had a disagreement a few months ago and he keeps bring it up.  Anything to make me feel bad, he told me I heard from this lady to use to like me from years he  just gloats, he told me he's not getting remarried because he's afraid it will fail like the other two. 

I told him, I think you're depressed, he didn't want to hear it...then he told me a month or so ago, I think I'm depressed, I just want to be alone, become a hermit.  No one will find my body for 3 weeks; I told him please stop talking like that.  Then he ends that conversation and turns on me again.

He is so snappy but nice to everyone else he smiles, he laughs he appears to e okay but once he's home and he's a change man. Its crazy, we were just together had a great time then Now he won't answer my calls, texts, nothing...I have stopped calling and texting.  He's only been a few days and it has been difficult because I really care for him. Maybe he's pushing me away.  He is hurting me so much. 

I want to call him so bad, I am trying to be strong and not contact him.  Because if I call and he don't answer, I will just feel more hurt He knows I love him and thinks I will always be there for him but he I don't know how much longer I can keep putting up with this. I have cry and cry and I'm tire of it.  I may have to let me go for my own sanity.