Overthinking or what?

Me and a friend of mine started dating guys in the military around the same time. No we didn't plan it, it just happened. Her bf was here in town and mine is states away, about to be countries away. Well now she and that guy have been over since last month but me and my guy are still going strong. She always ask how we are doing and tells me what I should do (though I don't need it). When me and him are talking and she's with me, she'll say " oh you don't need to talk to him" or "you can talk to him later." When I cant. He has a specific time, we barely talk, and she knows this. Whenever me and him snapchat she takes over it and I barely see the picture before she send HER face again or I don't even see it. Am I going crazy or is she jealous of my relationship?