How do i get my Boyfriend to respect/ love me?

My boyfriend treats me horribly. He calls me a slut fat lazy etc etc,, (to be perfectly honest he is double my size) but his excuse is that he was fat when we started dating and i "just got fat".. still im no where near his size.. He calls me lazy because i dont have a job or my licence, im going for them next week and when i can drive ill be able to hold a job, for obviouse reasons. and im in year 12 at school i do want to study and not commit to a job just yet.. I feel so let down he says he loves me "sometimes" we never go out anywhere nice and he yells at me and calls me names he is allways angry and it is allways my fault. he spends every saturday at auto barn buying parts for his car and socializing, and i just stand there and then every sunday i help him install things in his car on like 40 degree days.. i dont mind, i would like to be appricatied.. im not allowd to go out with friends therefor, ive lost most of my friends and if any boy even looks at me GOD HELP ME! he calls me suductive because once i smiled at a male shop keeper for helping us find something? i feel like im in jail, i know the person he can be and to be honest i love him! i do love him this is just his negitive aspects. i dont want to "change him" i just like to show him how it feels and maybe guide him into treating me nicer. Pleassseee anything will help me!