should I get a divorce?

I don't know whether I should get a divorce or not. Here's the deal: my husband is a good man, he's never cheated on me or physically abused me. But, i think he has verbally abused me with words, but he just doesn't know he's doing it.

Here are the bad things about our relationship:
-he constantly teases me about my social phobia/anxiety, saying I'm a "wimp", "crybaby", and that I just need to "toughen up, because my parents spoiled me". Nothing could be farther from the truth!
-He blames me for things that go wrong such as forgetting things, breaking something, etc. Sometimes its my fault and sometimes its not.
-I want very badly to start a vegan Living foods diet, but my husband doesn't want any part in it and thinks i'm crazy for wanting to do this.
-he's very tight with money, i can't even buy something i need, like food!
-we do not share the same sense of humor, desire for children, sexual desires, or interests (maybe just one or two interests)
-he will not defend me in a situation where someone is being mean to me
-I guess I'm overly-sensitive, but he doesn't understand how i feel

Here are the good things about our relationship:
-he is very faithful and so am I
-he doesn't make me do anything I hate to do
-we have fun together sometimes
-if he knows he's doing something wrong, he will truely be sorry, but if he doesn't know he did something wrong, he keeps doing it

I've tried for 3 years now to make the marriage better, but it's just not happening. We tried to compromise on how to spend out lives, but we never get anywhere, things just stay the way they are. The reason I married him in the first place was because we thought I was pregnant, but it turned out to be a false alarm. Also, my parents pressured me to marry him because he was successful, kind, ambitious, and was the complete opposite of me, so he could change me into something better. I admit I have changed dramatically for the better, but I'm still not happy because I feel like there's still someone better for me out there.
Does anybody have any advice? What should I do?
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