I Gave My Boyfriend My Virginity, Yet He's Doing This To Me

My boyfriend who I'm in love with complains and sometimes gets upset that my v*gina happens to be looser at sometimes than other times. He thinks I’m cheating, but I’m not. In fact, I lost my virginity to him when I was just 19 and we are planning to get married when I graduate from the University.

Now, I’m 22 and we are still an item and this problem is surfacing. What’s going on?