आप must insist on to not do that,If that thing is gonna hurt someone ,the feeling guilty is coming to warn आप that the thing may be not right ,It's like a battle आप must Insist on stopping it!!! I'm not perfect ,but I'm trying!!!!
Well, if आप can't do it without feeling guilty, it means that it IS wrong या what. I'd say आप shouldn't think about that thing, do things that आप like to do and focus on them. आप may also talk to a friend of yours या somebody that आप trust, and they could help you.
I don't really know what to say, but I hope it helps. :)