Feelings will always come back when you love someone
Some people think that you could control who you love. If the person doesen't love you back they tell you to "move on."
You can't wait around forever for that person and give up on other opportunites but when you really love someone, the feelings will always be there. If they go away for awhile they might come back later.
No one knows the future and some people think that you could only love someone you are in a relationship with. That is not true. The heart wants what the heart wants. So accept your feelings for that person but also give other guys a chance and what is meant to happen will happen.