Sex with bf

My bf literally has like a 4 1/2-5 in dick and it’s like I’m not used to that I’m used to much bigger guys... I’m not sure what to do with it because when we have sex it’s kind of disappointing and unsatisfying. He gives head very well and he is literally the best guy I have ever met.. it’s just the sex thing idk how to make it better or what to do.

No nasty comments please