First of all, a lot of basically straight men occasionally get a "guy crush" on another man. And it's very common for two men to develop a close friendship. This does not mean they're gay.
Second, there's a difference between "love" and "lust." It can be hard to tell them apart, but if you are having sexual fantasies about this guy, there's lust involved. That's okay, but be sure you both understand what's going on before getting in too deep.
It is impossible and irrelevant to measure degrees of gayness. If a man is sending love poems to another man and has an emotional attachment to him, then yes, it is possible that he is gay, but he may also be bisexual.
Because he is a gay man
No, although a straight man can love a gay man as a best friend.
Yes, because I was that Gay man she fell in love with.
If by "men" you mean straight men then yes it is entirely possible for a staight man to love a gay man or even another straight man without being gay himself. This does not mean however that the straight man suddenly becomes a gay man and neither does it indicate that the man is bisexual. It simply means that he is attracted to a certain male but is still strictly attracted to girls.
Usually the same way as a woman wins a man. Much more difficult is the process of actually finding another suitable gay man that they like.
Yes, a straight man can possibly love a gay man as a friend, but nothing more than that because of the fact his friend is homosexual and he is heterosexual.
well when a man has an "attraction" to another man.
yes
a man who is married to another man
Their is no special way gay men act. Each gay man is different from one another. This guy just needs to be himself. Whether he is straight or gay. Also he is no less of a man if he is gay, and their is nothing to be ashamed about being gay. One more thing he needs to love himself too.
If he's the right man, he'll fall in love with you. If not, move on.