<human>: So we broke up a little over a year ago over various reasons. I know I'm still a little bitter about how everything went down but I know I don't want her back. We haven't talked since then. Most we spoke was maybe 5 minutes on the phone, once, the beginning of the school year. 

We don't have classes together, but every now and then I bump into her in the hallways. I would get really anxious just seeing her and feel really uncomfortable and I would constantly feel this pressure in my stomach. This is only happening if it's unexpected. I know the route she takes to class and sometimes I'll prepare myself but usually it catches me off guard. This can happen just as simple as seeing her name pop up on my facebook. Not deleting her because I've tried that before and I told her I want to be on good grounds with her. Deleting her now would just a be a big middle finger to her. I just want to know if this feeling is natural and should it continue even after 1 year. I know I don't love her anymore, but I know I'll always have a soft spot for her because she was my first love and bestfriend.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Broke up with ex over a year ago, still get anxious if I unexpectedly bump into her. Is this normal? What do?