[Charu]

Okay, so if you're saying that, then why on earth are you even lamenting about it and asking for advice? Everyone is going to tell you the same thing. Respect who they are and have them make their own decision regarding how they look. If they want to remain masculine, it should be their call. Or if you can't, then tell them straight and drop the relationship without breaking too much of a heart.

That being said, if this really is gonna be a problem but you do care, then perhaps you could always pretend their appearance is to your standards until you actually believe it. Y'know, tricking yourself and whatnot.

That is if you really do care for this person. You can mess with people, but mess with their hearts and it's a whole different ball game. The way you worded it in the OP made me think you were considering dropping them.