He is known as an egotistical bully, and I believe he uses his friendship with my boyfriend to elevate his own image and legitimize his toxic actions.

Done: While your reasons for playing the role of Toxic Avenger may be noble, it’s time to hang up the cape. If it’s your resentment that’s affecting your relationship rather than anything the friend is doing to you or your relationship, then you’ve got to put it to rest. If you don’t, you risk toxicity yourself.

I would never give my boyfriend the ultimatum to choose me over his friend, but I have to admit, I feel some resentment every time he spends time with him.