my ex bsf had OCD and i haven’t had a bsf since

so this is really weird…. i was friends with a girl for 7 years met her when i was 12 she was 14. we were attached to the hip she was my everything and we ended up not being friends anymore it’s killing me …our friendship was really complicated and different than a normal friendship we shared almost the same exact ocd subtypes and didn’t even at the time know it was ocd but we would talk to each other in our heads when we were gone to ask for guidance on what to wear or if something was good or not and we would take everything showers together for an hour and do our rituals tg and we would watch the same movies over and over cause it were the only movies we could watch, same with music. we deemed certain music we didn’t liek as evil and bad because it rlly felt that way. we had the same pocd about subliminals getting into our heads or being watched with cameras in our room . once we got older i got a bf and it kinda ruined our friendship and we didn’t see a each other for 2 years…we got together one day to talk after all that time and she told me she got diagnosed w ocd and was in a religious psychosis and was “talking to god and hearing him in her head “ ( basically exactly how we would talk to each other in our heads) after she told me she said that we couldn’t be friends anymore because we weren’t good for each other and she thought i needed help and now she is complete turned christian god fearing woman who won’t have sex before marriage won’t b friends w me bc im not christian and she feels as if im polluting her life and sending her back into old ways but j can’t help but notice that she’s completely different and it’s super heartbreaking bc how did it go this far? how did she spiral so much? im here for her i wish i could just help her snap out of it but maybe this is just who she is now idk…ill never be that close with anyone in my life ever again. we shared something that is really rare and hard to relate to with other people and she understood me and my feelings and what i struggled with more than anyone ever will and i can’t get over it i ruminate about it everyday its been 3 years now since we have been friends and cant for the life of me get over her. i will try to recreate the rituals we did and get that same feeling of content and comfort but its never the same.