Why do I start to feel a little sick when I see her around or see a picture of her?

I mean the girl hurt me bad and stuff, and I still have feelings for her and I can't help it and always will... but ugh I see her and my heart races again, even just a pic of her, and I start to feel a little nauseous at the same time... I don't wanna hear any "eww she must be ugly/gross looking" lol because she was the most beautiful girl I have ever laid eyes on... :(

what's causing me to feel sick tho? was I just hurt really bad?
Why do I start to feel a little sick when I see her around or see a picture of her?
Post Opinion