What do i do??

Im currently in a relationship with my boyfriend of 7 months and my whole life considered myself to be heterosexual with a sexual attraction to girls but recently i met a girl who i think im developing feelings for. I feel like im betraying my boyfriend in a way and i fear that if the opportunity ever comes up i wont be able to stop myself from cheating on him. I love my boyfriend so much but this revelation about myself has me second guessing a lot of things. Please help!!