Hey @unsure! Welcome to the Play Safe forums 🙂
Our resident expert @Nurse_Nettie will be able to provide all of the deets about blue balls but I just to jump in to say that sex as much about you as it is your boyfriend, so you should only have sex when you want to (pressure-free consent), and your needs are also considered.
Ah the good old trusty missionary position! I’ve been in a similar position (pun totally intended :wink:) but I found that mentioning that I saw/heard/read an awesome thing I wanted to try, and taking the reigns meant getting a little more adventurous between the sheets!
This question is actually not really irrelevant to your first question because both come down to talking about sex with your boyfriend. Rather than feeling like sex is a chore or feeling guilty, and not getting any enjoyment out of it, you should talk about your thoughts, feelings, needs and wants (and you can totally say things like “I like it when you…”). By having this all out in the open, he’ll be aware of what turns you on and pay more attention to those signs (and we all can give some pretty clear ones!) of when it’s a good time for sex, and when it isn’t.
Have you had open discussions with your boyfriend before?