wHAt dO I dO????

so me and my boyfriend have been dating for over a year. I’m 16, he’s 18, and he’s going into the military after he graduates high school this year. We have made promises and said i love you and are very happy and in love.

But I recently just got in contact with an old guy friend, and I’ve caught some feelings for him. I feel really awful and guilty because I love my boyfriend, but I picture myself with the other guy :/

Please help me. Is this just a phase? Does this happen to everyone? Should I break up with him?