Why can't my OCD just let me have feelings for her

So I have strong feelings for this girl and I feel like I connect with her so well. We also have so many shared values and it feels so nice to talk to her and I just feel like we get each other. I have seen her quite a bit off and on for the last two years and she lives where i am going to college. This is not limmerence. I have felt that before and this is not it. The OCD thing is that I do not do drugs or alcohol because I like to be present (and I used to have ocd about them, but now mostly the present thing and I don't want to take up drugs/alcohol as escapism from OCD, which is not a compulsion because I am not obsessing about addiction risk in myself). Honestly I have slight indications that she does not like alcohol and casinos (judging by her tone when she mentioned them--also I like casinos a bit but only with a very small amount of money--) and she is definately very into getting offline and having no social media. However, my ocd is yelling at me saying that she is going to be high on weed (or drunk) all the time because she lives in a hip area of Los Angeles) but I have no evidence. In fact I saw her at an art event that her family was throwing. There was an open bar and she didn't have anything that I saw for the duration of my time there. I am not throwing in these counterarguments to get reassurance--I am throwing them in to show you all how crazy my ocd is being. And the craziest part is that deep down I don't really care that much if she uses substances. I have friends who do and I like to go to parties. My ocd is just yelling at me saying that this is going to be a big incomparability and ruin everything, like what if she doesn't like that I am sober (again ironically, all actual evidence points to her liking that i am sober) I really like this girl and I am determined to be brave and get over this ocd on the chance that I can be with her, but it keeps throwing thoughts at me. I really haven't been doing intentional compulsuons. Like I said, I am aware how stupid this is all around, but my ocd keeps trying to sabotage this I havent actually engaged in intentional compulsions in 7 months but it has been more difficult on my visit to LA in the last few days while I have seen her. Still resisting purposefully doing compulsions though. That being said, the difficult part and why I am writing this is because I want to think of her (and do) because she is wonderful, but it is hard to think of her without getting sucked into the OCD thoughts and tiny unintentional mentall compulsions. It keeps throwing things like this at me and I just wish it would let me be like it was doing for a while until this visit to LA.