I second the advice of bobdylan. Don't let a boyfriend pressure you to do ANYTHING sexually that is not something you want to do, and I'm not just talking about you wanting to do it in order to please him, but you have to want to do it because thinking of it makes you sexually excited. If it is not exciting, it will not be fun, and will probably be painful, and what kind of boyfriend will pressure you to do something painful???
Why is he so interested in anal, anyway? Is it because it's the only kind of penetrative sex ha can get? (Some couples, especially young ones, only do anal because they are afraid of pregnancy from vaginal sex.) If this is the case, get yourself on the pill, and use it AND condoms, and have vaginal sex. Anal really doesn't do much for most women. Don't force yourself just because your boyfriend is pressuring you.
Hi don't let your boyfriend bully you into having Anal sex at all or something you don't want to do ,Please stay off the Drink and sleeping tablets they are not doing you no good at all , it's fun having a drink but when you forget things you have done tha'ts when the problems start , Please Take care , x