I am not sure what not to understand. Meaning of a friend would change with marital status in a sense that if for example if a man is married, holding hands with him or whatever other physical contacts might not be a good idea. If he is single then whatever you two are doing is fine. Usually married men want physical contact ( and often emotional contact) with other women not because they are looking for a friend.

You can't treat everybody equally and do whatever others want you to do. It only causes unhappiness. You end up being used. They move on. But you still think of them yeRs later and now feel guilty. Life is too short.

And honestly if you look for friendship start looking for females. Having girlfriends. If you want a relationship thought search for single men.

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Sounds like you want to hold on to your "filthy" feeling & guilt for something you didn't do to somehow punish yourself. If you are talking sin...look at what the bible says about it since that is where the definition comes from in the first place. You aren't the one that sinned in this case....own what is REAL. There are enough REAL sins we do we don't have to pile on imagined ones.

You can treat all people equal & still have different boundaries for each one. That is how we safely get through life & still have good relationships with others.