There’s a lot of hormones raging in any teenager so it’s not surprising the boys are prone to cheating and the girls are prone to drama. But there is no direct relationship between your care for someone else and their care for you. It’s not like a bank machine where you put your care in and then later you withdraw it. You each come with your own upbringings and your own tendencies in terms of how you were taught to deliver love (gifts, time, touch, talking, assistance etc.). It would be incredibly unlikely if both parties gave equally or in the same ways. For instance, if a guy had a distant, non-demonstrative father who never gave gifts then the guy is likely to be the sort of person who never buys a birthday card or gives a massage or barely says I love you. She can think he doesn’t love her but then the same guy can be solid and enduring during chemotherapy or with a very sick child. Likewise a woman who doesn’t show much affection or offer much attention to her partner can still be a remarkable partner to have during the death of a family member or for the most trusted of duties. You should be with people because of how they are in the world, not because they tick off a bunch of boxes in some magazine or off some list created by your friends. Your partner is not in a movie performing a romantic role for you. Your partner is a person with their own drives, interests and values and personality. The differences between you can coincide and be very compatible and helpful to both people. But you’ll still both routinely fail to meet each others expectations. But that’s not them failing. That’s you expecting. That’s not their problem, that’s yours. Lose the expectations and you’ll lose the pain too. Let people be who they are, don’t tell them what to do, but be fully yourself and that will make you an enjoyable person to be with. After that the rest will take care of itself.