Oh child 15 years of age didn't anyone ever tell you the first love hurts in the years to come when the one your to be with comes to you you will surely laugh. Love it hard and at times heart wrenching, beside this person seems to be the one at lost you seem to be a person with a heart. Cry and let Jesus wipe your tears, this will pass, The feelings have already been taken away they just have to manifest themselves in your life, it not an easy walk, walking away from pain, you will and growing up you will be able to have compassion for another when they hurt. It never hurts to tell jesus how your pain and ask for the help to see it through, you may find many loves on your walk to find the right one, just stay focused on Jesus he will guide and lead you. I feel your pain and wish I could take it for you, all I can say is this will pass. By the way your already following Jesus otherwise you would have never asked his help. God bless you, dry your tears and move forward.