My boyfriend and I have been together for about 2 years. Recently I’ve noticed he’s liked when other girls flirt with him in front of me or check him out around me? Then he likes when I say how they were checking him out. He says he thinks it cute when I get all crazy or whatever when I say there were checking him out. I don't know why would my boyfriend want me to get jealous? I feel like thats really immature for a 21 year old and being in a relationship? I feel like he just wants attention from other females.