Is it wrong?

Kimberly
So a little over 2 years ago my SO and I met online, 1700 miles away from each other. I moved to be with him after graduation, and what not.... Well he has another girl he's constantly talking to who lives about 2,000 miles away, so not much further than I was and I get super jealous. I stalk her profile to see what he's commented on/liked. I told him how I felt and he always tells me not to worry he only loves me, that they're just friends... Is it wrong I feel this way, that I basically want them not to be friends or anything like that?