Hey JD.
I would concur with serendip's advice.
I have two daughters.
One movie scene I liked was in the Godfather. In one scene, when Michael was dating his future wife in old world Sicily he would walk with her. Then in the distance, they were followed by her female family members. The idea was to give some privacy, which is necessary in courtship, but also not leave the young couple at the mercy of their carnal desires.
You can tell I have two daughters. I also tell my oldest she should let me pick her husband for her. For some reason she thinks that is dumb. I think if we compare my choice and hers 20 years after, we will both agree that mine was the better choice.
Sorry. I have daughters.
As to your question of what is or is not sin. Well I guess I would refer you to Matthew 5. The point Jesus is making there is that even if you have a list of what is and isn't allowed, you can still sin. The point is that sin is not the physical violation of a rule, it is a matter of falling short in your heart. Loving and desiring the wrong things. That is simply our nature. If we only needed to follow rules, we would only need a teacher. But our sin is in our nature. We need more then a teacher. We need a saviour.
That is also why salvation can never come from following a list of rules. Salvation can only come through faith in Christ. If you could earn your salvation by following rules, Christ wouldn't have needed to be sacrificed. That is from Galatians. I can't remember which verses.
God's law is written in your heart. Pray and ask Him if you are sinning. He is the one you need to be concerned about. Not some group of men.
CYP