'Sorry to you' means that you are sorry to the person maybe for something bad you have done which has upset them. "I am so sorry." 'Sorry for you' means you are sorry for the person because something bad has happened to them but it was not your fault. If you can empathise or sympathise with the person, you would say "I feel sorry for you". 'Ok for me' means something is good for you. It suits you. It is not bad for you. "That temperature is ok for me" 'Ok to me' is very similar. You could use this to agree with someone, 'That sounds ok to me'. There is not much difference between the statements. They are almost interchangeable. I hope my answer helped and that it wasn't confusing! :)
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