Issue with my boyfriends bestfriend (all advice and opinions welcome please🙏😭)

Me and my boyfriend, (that for the sake of this story we will call Sam) have been together for a little over 2 months now but have been close friends for about a year and knew eachother for 3 years. He has a pretty dodgy relationship with his own friend group as they aren't very open minded with different styles and people that are different from them (eg. Race, Ethnicity, Religion,). Me and Sam are alternative and I have had the style outwardly for years but he has only really come into it last year through my guidance. His friend group makes fun of him all the time for it calling him an emo and a freak aswell as other things.

In around May of last year I had previously confessed my feelings to Sam and he told me he had feelings for me too, he then told his friends about it because he was excited and they did not approve at all. They made fun of us the entire day and kept telling me Sam is going to break up with me and all this stuff. Later on we did break up but it didn't necessarily matter to me because it was for like 6 hours so it doesn't even matter but his friends had influenced him into doing so as he did actually like me then.

Over the summer he ended up getting with a girl in our year (that we will call Rebecca for this story). I HATE Rebecca because of how she treats people and some previous incidents that are irrelevant to the story. His friend group didn't like her either and they eventually broke up a few months after. Sam was devastated but we were close friends at the time and I helped him through it. I did not have feelings for Sam at this time as I had an eye out for his friend (we will call him James). Me and James are in the same maths class but that's the only class we have in common, both of our older brothers were in the same year and have now graduated. I honestly really liked James and was over the moon at the fact that we were talking a lot because I had my eye on him for a while at this point in time.

James and one of Sam's friends came over to me and my friend in between classes grinning and staring at me before talking to my friend in private. I thought I was caught and they knew I liked James but my friend told me afterwards that they were asking if I liked Sam again. I then went over to Sam as we had a class together and told him what happened and he told me that his friends thought I was swooping in after Rebecca to see if I could get a chance with Sam. He told me that his friends were all saying don't turn to the "dark side" (as in me because they hate me for some reason that I still don't know of). I was obviously upset about this as I only saw him as a friend and I didn't understand what I even did to make the friend group dislike me.

James and I began talking less as he said something rude behind my back to the friend group and I don't just ignore when people are rude to me. A month later me and Sam ended up together because we had gotten way closer and I realized I never stopped liking him and I had just put the feelings away so I could be there for him as a friend when that's what he needed with Rebecca.

James has been acting off recently and according to Sam, James has been ignoring him and being passive aggressive and just generally weird about something. Sam and his friend (we'll call him Leon) have come to the conclusion that James liked me and got salty because I got with Sam. I personally really doubt that's the reason as I only noticed him acting differently 2 months after we got together.

2 years ago James's mother was really sick and had cancer but he felt as though he couldn't tell anybody because of the friend group he had. His friend group most likely would have made fun of him for it as we know from previous incidents that they have barely to no amount of empathy for anyone. (Some of them used to joke about how they could understand why my mother would have physically and mentally abused me) (that's over for years now by the way it was just one example of what I mean). Because of this James has a hard time opening up about his problems, I'm not really friends with James anymore but I still care about him and I feel upset seeing him upset and acting distant.

I've tried to reach out and try to become friends again around James's birthday as Leon's birthday was a day before James and I had made brownies and wanted to share with the both of them as a small birthday present. James refused because I was the one that had made it, this made me upset but I put it past me. About a week ago I reached out to James about his behavior as it had began to worry me because I know he struggles with bottling up his issues. I told him that I didn't want to overstep but I wanted him to know that even though we don't really speak much anymore I still care and want to help him if there was an issue. He ignored my message and I texted him again yesterday saying I really don't want him to ghost me and I understand that our relationship has been a little rough recently but I am genuinely worried about him and I understand if he doesn't want to talk about it but I gave him the option that I'm here to listen if there is anything. I mentioned about how I'm sorry if I did anything to upset him but I'd rather if he told me what I did so I could apologize properly or try to fix it. He left me on opened.

Every week I make desserts and sweet treats for all my friends including Sam and Leon and I was worried about James so I made some extra to give to him yesterday so I gave it to Sam to give to James so it'd be easier as I'm not good with social interactions especially because me and James dont really talk anymore. Originally James said yes but when he found out I made it he immediately changed his mind and said he didn't want it but reluctantly tried it and gave the rest to his friend in his group that hates my guts. (This was before yesterday's messages btw) I was upset and my feelings bled into the messages to James yesterday. I'm now still on delivered but I know he's on his phone as I've been watching his snapscore because I'm an overthinker. (Not in a creepy way guys😭)

What do I do now?