If a dude wants to fuck and you say no and he takes that for an answer and abandons that quest, you may be right and he is a true friend. The problem is, you're not a mind reader, so you'd never really know if that's what he's doing unless he just finds another chick and commits to her and even that's no guarantee depending on his character.
A lot of dudes pretend to accept a woman telling them it's not going to happen while deluding themselves into believing that if they play their cards right, they'll get what they want. It doesn't matter what you tell dudes like that, they are going to secretly continue wanting what they want and the two of you will have completely different ideas of what your friendship is.
If everything he does with you and for you is in some part motivated by his desire to either fuck you or be with you, you're not really a friend, you're a project. If you don't at least acknowledge that possibility, you could be setting your up for a headache. I've seen multiple lame ass niggas explode of women because they thought those women were leading them on when in reality, they just refused to take that woman at her word when she said she wasn't interested. And in some of those cases I warned the chick it was going to happen.
