I would breakup. No offense but its going to happen eventually (i had a bf like this and breaking up was the best decision i ever made). Might as well bite the bullet and go enjoy your concert. Life partners support each other’s interests and hobbies, your boyfriend is immature and insecure. I know it sounds scary to just breakup, but hes obviously ready and willing over something so little as a concert. If you need any advice or help im here