Will religion always matter in a relationship?

Through an international dating blog, I met a girl who brought life into my dull world. We were both happy with each other. Then we met and decided to introduce each other to our families. After that, my girlfriend became cold and broke up with me. Ladies are really hard to figure out. I was devastated because I really canít take the idea of my girlfriend dumping me because of my religion. I donít understand why. She said she canít be with someone like me. I was left out puzzled. For quite a long time, I have been thinking if religion really matters. Does that affect a relationship? I mean, isnít it love that all matters?