I need some help with this decision.
You see, even though I dropped IT: Multimedia, I am willingly helping 2 of my friends with their major projects. I am helping Person A with his Mario Skit (I'm Luigi

) due to me doing Drama and am a huge Mario fan and I am helping Person B with level designning for his game since I like the draw levels of various games in my spare time as well as play a lot of Super Mario Maker.
The problem comes in Person Bs project, as while I'm helping with the level design he has Person C (who I am no longer friends with) to do Music and Sound as he is pretty good at it. I don't have issue with him being involved as he and Person B are friends and he is good at what he does but he has a massive with me helping Persn B just because we don't like each other (even though we don't have to interact at all and I don't have issues with him personally as I simple moved on as he isn't the person who I was friends with anymore) even though I am friends with Person B.
I'm thinking about dropping from the team as it seems that this will be too much of hassle for Person B if Person C is going to act like child with me working on the project but at the same time, I don't want to leave them in the Level Design deep hole as they have 0 experience at it not to mention the game is a platformer and they rarely play that genre.
I really don't know what to do, any suggestions?