I like that another girl has a crush on my boyfriend

My boyfriend has a friend that's a girl and I know she has a crush on him. She knows I'm his girlfriend and we have met several times. I have told my boyfriend she likes him as I catch her looking at him all the time and she calls him randomly for no reason just to say how are you what are you doing (aka checking up on him) and wants to come over to see him often (more so while I was away visiting family last month), but he doesn't really think much of it and has told me she's not the sort of girl he would be interested in romantically, and I believe him when he says he would never betray me. Recently I have been finding myself wanting her to come over and be around us as I want her to be jealous that he's taken by me. I kiss him and stroke his hair etc. In front of her. I think this is because he's my first serious relationship and I've never had anything for other people to envy before. Most other girls wouldn't want any girl within 100 miles of her boyfriend if she had a crush on him, is it weird that I like it?