Only reasons I'm asking is because he always makes a big effort to spend time with me too (his closest female friend). Yesterday we went to the shooting range with some of our other friends and I told him to bring his girlfriend since I haven't met her yet. He claimed she had some family thing to go to around the time that we left though. The other reason is when we were driving home he said "she just sent me like 30 texts even though she knows I'm at the shooting range" he kinda laughed but I sensed that he was a bit annoyed. I'm also asking because I find myself gaining feelings for him and I'm pretty sure they've always been there but I would never do anything to jeopardize his relationship.