Well,to begin with,the one that you DO love ....is married.

You say you love him.Love entails wanting the very best for someone.

That means that his marriage should remain uninfluenced by you or anyone else.And just as you'd hope no one would disturb the sanctity of any marriage or intimate relationship that YOU have,I think it'd be the moral thing to do,to not interfere with his union by conversing with him in any flirtatious way that may disrupt the course of his choice of a wife.

As far as the guy you don't love,I think it'd be so painful if I loved someone and found that they'd been with me for the simple sake of 'not being alone'.

I also believe in 'karma'....we draw energy to our selves with our thought process,action,inaction,and so forth.So I would personally cringe at drawing this energy to myself.

Please do this one thing as you move forward,put yourself in the shoes of both men,and the one wifes shoes.Imagine anything you do as someone doing it to you.

Now,if you can be honest with the man that you don't love.If you find value in him.If you feel a connection with him.If you think you have the ability to be a good friend to him and you say clearly,I need you to understand that I am not 'in love ' with you,but,I care for you,and would love to spend time with you,then it is his choice to accept ....or not.

But,imo,honesty or consideration in all things.... if possible,should have the utmost precedence in the decisions we make where it affects others.

Just my thoughts.I certainly have screwed things up throughout the course of my life.And you asked specifically for 'advice'.