I (19F) have been having really intense fantasies about cheating on my boyfriend (26M)

For context my boyfriend is in the navy and it takes up all of his time. We never have sex anymore and when we do it’s boring and I never get off. I love him and know this is only temporary but I can’t help but imagine myself with other people while he’s at work. Before I go to bed I’ve been using my vibrator imagining getting double teamed by the neighbors in our bed. The thought of getting stretched by two at once drives me wild. I haven’t gotten the courage to actually act out my fantasies but I think I’m getting to the point where I might have to.