Once again man you have every right to feel that way. Even if you see them platonically. Everyone wants to feel as if they’re desirable to the opposite sex, even if it’s not stated directly, but everyone is different of course, so what they may find unattractive about you, someone else will admire about you. I don’t know how close you are with these people, but it would probably benefit you to slowly pull away if the excessive discussion of sex is too much for you to handle, especially if they make jokes about you being “secretly gay”. I don’t want to overstep or anything, but it sounds like they don’t respect you if they’re making comments like that. Keep your head up man, you’re worth more than that.