Would this be considered cheating? PLEASE HELP!!!?

My ex boyfriend and I dated for a year and we were in a long distance relationship. His parents loved me but were never approving of our relationship because of the timing (he graduated dental school in June and isn't employed yet so they didn't think he was ready for such a commitment ). So we broke up. We obviously still love each other but I can't wait forever, especially for something I don't see him working hard for, although I love him, its just not fair for me. I really am interested in seeking someone through the same dating app we met on, but I'm afraid he might find out and get upset with me.