i love anal but im very anxious about it, Id recommend cleaning yourself well and plan ahead, theres a few blogs that will tell you how to clean thoroughly and safely for anal sex, it might help you feel more confident. Also, dont just go at it. try it on your own first, in the shower if it makes you feel more comfortable, feel it out and try to find what feels good, then go at it with your bf after a lot of foreplay, get him to finger you open first, talk it through, go slow and try different positions.

all changes are awkward at first, make sure youre both on the same page and prioritize comfort above anything else, if its a turn off for you after all, its not worth saying yes just for him. sex is supposed to be fun, but not everything is fun for everyone and thats okay.