Can anyone give me any tips?

Ok im 20 and been with my boyfriend for 3 years. There's some things about me that I am unsure about.

-I don't like to masturbate, it doesn't do anything for me, and I feel digesting afterward.

-when it comes to sex, my boyfriend has to use a toy for me to ever climax. It doesn't happen when We have sex together.

-if I don't climax first, sex doesn't feel good. It only feels good after I climax because it's tight.

-I don't like it if he ever tries to finger me, it doesn't feel good at all and seems pretty pointless...

I really want to have good sex and it's frustrating. He's not lacking in size or energy by any means. I get in the mood and am completely into it but I can't seem to climax.

We've tried different positions and everything.

Any suggestions?