My boyfriend and I are both 20, and were virgins before we decided to have sex. I had not really masturbated any and our first time was incredibly painful (He's not small). We have tried many times since then, but each time is still very painful. We've used lube and lots of it, but it doesn't seem to help. I recently bought a vibrator to maybe stretch myself out, but we still avoid sex. Any tips to make sex actually enjoyable for me?