A friend from high school recently was in contact with me asking to meet up. He has strayed from the path in recent years and I’m not sure of his intention in contacting me
I was able to delay a bit because I’m out of the town we both live in for the next few weeks
Is there a halachic obligation to help him or is it my choice ?
If he asked you to meet up with him, you never know what he wants, but it might be because he now wants to get a little closer to his heritage. It would be a big mitzva to help him come back to his roots in any way that you can. Go meet him, and after you meet him, your will have a better picture of what he wants and then you can assess the situation better.