I would love to know what my boyfriend's friends think of me! Is there any way to know?

Honestly, the best way too find out is to just ask him. Tell him that you want to know what his friends think about you, and if he tells you that he loves you than he means it and unless there is some reason not to trust him he will be telling the truth. I do not suggest to dwell over it too much because guys don't like it if you get too nosy. You probably tell your friends things that you don't tell your boyfriend and all you can do is just ask him to always be completley honest with you.