Well! I do not blame you and I do not think you are controling. One thing that does concern me. Is this guy a girl's playboy or a boys playboy? It is true that some men who are homeosexual do not intereact with woman very well. It also concerns me that your boyfriend is so easily influenced by him, and your boyfriend should not allow his friend to walk into your home and ignore you........really! that makes him just as bad. Your boyfriend makes it easy for this guy to ignore you. If this guy is not gay then he must be very immature, the type that is always a school boy and thinks of woman as mother figures.
If this annoys you now then it will get worse the longer it goes on. YOu did n ot say how old you were. THe age gap between your boyfriend and this guy also sounds a bit odd. THe situation does not make your boyfriend look very good. Perhaps you want to rethink whether or not you want to be in this relationship. Men do not tend to take you for granted until they are married to you, so this situation is likely to get much worse.