"Integrity is doing the right thing even if no one is watching".
From your post and your profile I believe that you are displaying integrity. You are thinking about your actions.
You will know if what you are doing is wrong the moment it happens.
If that happens all you have to do is make the choice to stop. You need to know in your own mind that when the time comes you can make that choice.
Am i questioning myself too much or is this good for me?
This may sound crazy but I often have this silly wish that some woman would come on to my FWH and he would rebuff her. I would like to know this happened.
How can anyone ever know that they have the ability to resist temptation if they don't experience it? I don't think you are meaning to send out "available" signals but if this is happening and you don't actually mean that then you have choices about how to respond to any advances.
I truly believe I would make great progress in my healing if I knew that some very attractive woman made advances towards my FWH and he said "No thanks, I'm married".
but what if my idea of friendly is taken as something else.
Then you explain. Quietly and calmly. "I'm sorry if you misunderstood. I am in a committed relationship".
Then you tell your partner what happened and how you responded.