I need of relationship advice!!!!

Id
Last March I was in a very weird relationship. The boy I was with wasn't very affectionate nor romantic, but I was still in love with him. He broke suddenly broke up with me giving me no reason as to why and I didn't get closure until 9 months after. It turns out he was in love with another girl the entire time he was with me. He absolutely broke my heart. I recently started dating a new guy, who is the total opposite of him, he is very affection and romantic and tells me how much I mean to him all the time. I am finally happy with someone but I can't seem to let myself fall for him completely bc of my past with guys, which is totally unfair to him. I just don't know how to get past being fucked over to let myself be fully content and comfortable with my new guy.