So I’m not sure if this is the right sub bc I’m not sure what exactly I’m experiencing!

I’m very bad at making close friends but there’s certain friends that once I click with, I don’t stop thinking about. I’m a huge introvert but after engaging with them I feel more energized and happier and I feel like I want to open up to them, which is unusual for me. The problem is that thinking about them gets annoying and I also get extremely upset when I can’t see them for a while. It’s almost like my brain latches into them for happiness and can only find other happiness if I’m distracted. I don’t act on any of these feelings in a weird way, I only try better to be a good friend and hang out with them as much as I can. This experience also seems to fade after a few months, and the obsession dials down and they turn into a normal friend. 

Does anyone else deal with this, know how to cope with it, or have any advice at all?