I'm going to make my boyfriend leave a concert that we just got to because I had a panic attack
Why would you make him leave the a concert with you?
I feel guilty but my anxiety is too much to handle.
Having a panic attack at a concert must be terrible for you, but is there a way for him to stay even if you leave? He will be frustrated if he's enjoying the concert and you make him leave. Maybe you could call someone else to pick you up.
I'm not going to make him stay. I don't want to deal with going home alone, is that being too selfish?
Well, it is selfish kind of. He will be upset even if you are having an anxiety attack. If you let him stay then he will be grateful to you forever.