Moving on

I had feelings for my female best friend I confessed it 4 years ago, she said no, we remained friends for 1 year after that 3 years ago I asked her to stop to talk to me because I have feelings and I couldn't control it and be just a friend and made her block me, we used to text through sms on each other bdays and update each other something important like jobs and any other life updates (2-3 times a year) 24th dec was my bday, she wished me I asked her can we be friends like before if not just be in each other social circle, she declined and after sometime she said that she is in love with someone else, even though I know that this would happen and I've moved on it still hurts and disappoints me ever since this happened I'm having a headache that I can't get rid off Or sleep, I eel like mind fucked, I had a crazy feeling like my stomach started to growl and my body temperature increased, I'm feeling something that I can't explain. I'm venting to my friends yet still I'm not able to feel free, can anyone offer me some insight and advise please.