<human>: Hey guys. I started dating Luke officially about two months ago. Things have been pretty good, I would say I care about him quite a lot. We get along well and don't seem to run out of things to talk about. 

He had recently gotten out of a 1.5 year-long relationship with a girl (19F) when we started seeing each other. About a month after they broke up. I get that theres leftover feelings and stuff but.. come on. He talks about her ALL THE TIME. She ghosted him when he started seeing me even though he told me he wanted to stay friends with her, which i get because they were a big part of each other's lives for a long time.  

Anyways any point in which Luke could bring his ex up he will. For example a couple days ago I sent him a photo of a cat on snapchat and said that I wanted this cat so bad. He replied saying that ex had recently gotten a new cat (pre-ghosting) and it looked just like the cat I wanted.

He also has this weird fricking shrine to her. A legit shrine. He has this dresser in his bedroom and it's covered in all the stuff she gave him, christmas presents letters and  probably her toenail clippings.

Probs 30% of our conversation revolves around her. Even trying to watch a movie together on Netflix involves her. 'Ex loves this movie, oh we should watch it.' I don't care what she loves?

He hasnt talked to his Ex in months because she refuses to associate with him in any way and he is STILL obsessed with her. He stalks all of her social media and tells his roommates whats going on with her as though he just happened to come across it.

I really care about Luke and I can see this relationship going somewhere but I don't want to be a placeholder. I just want him to be with me.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: New boyfriend obsessively talks about ex, stalks her social media and updates me and has a shrine to her in his bedroom. I don't know whether to hope he gets over it or run for the hills.