I have something I need a bit of help with, and I’m not sure where to turn.

A woman I used to know came back into my online radar. I’ll spare the details, but I haven’t had contact with her since I was a pre-teen, a time period when I had a huge crush on her. However, since then she’s gotten involved in a lot of stuff that isn’t too good. My problem comes in that seeing pictures of her again brought back all those old feelings, and new ones. Every time I see one of those pictures it practically feels like my chest is going to burst, and like I’ll lose my mind. When people describe love, that’s what it sounds like and feels like, but I know it’s not that.But at the same time, I can’t fight the urge to attempt to contact her, or quit looking into what info she’s put out there.

I need to know a good way to get myself away from this feeling and cycle of going back. If my sister finds out about any of this, even if there’s no contact, she’ll be livid. Any help folks?