Teenage Heartbreak:

“A person’s faith is also a good indicator as to the health of the relationship, Matt says. If a guy doesn’t love you for your faith, character and personality, then he’s more than likely with you for other reasons. You can tell how a guy really feels about you by how he treats you, by the things he says to you, and how he chooses to show his affection for you. Don’t forget to check your faith, too. If you don’t have a strong relationship with Jesus Christ, take the time to grow that before you get involved with a new relationship. When things get tough and your feelings start to get overwhelming, remember these wise words of Eleventyseven: Guys and girls may break your heart but [God will] always be there. “

This is a good basic article on determining if a guy genuinely likes you. It is an encouraging reminder that even strong feelings will decline with new circumstances. I also feel grieving is needed.