Who do I choose without hurting anyone?

I have been involved with a man for four months after being in a relationship for over five years. When my long term relationship ended I was distraught and this new guy really took me through it. I thought I loved this new man but I am still in love with my ex. i want to get back to him because we love each other very much, but the man I have now has done so much for me I don't want to leave him and seem wicked.