She is a good girl, as far as I can tell. You do not report that she has been unkind to you, rude to you, or anything. I do not know what it is that you are unhappy about - the problem is in your head, and no, there are no medications to deal with this problem - you need to change the way you think and look at things, and medications do not do that for us. Medications can dull the pain, but they won't do so selectively - you will have to "pay" for having the pain dulled for you by being less emotionally sensitive - we call it "feeling flat" in English. That would be a last resort measure for you. Save it for later.

For now, stop using the language you are using. Saying words that match the situation will by itself help you, without any extra effort - words we use are very important.

For example, you said that you are having trouble "forgiving her". Well, my friend, you will have that trouble forever because it is impossible to "forgive" her since she did not do anything to you that was so bad that it would have then required forgiveness. What did she do to you (before even meeting you) that was so bad? Did the rob you or maim you? Did she ruin your reputation in the community and your good name via slander? What did she do? Nothing. So there is nothing to forgive - drop this word and the problem will be solved.

Regarding the issue being too sensitive in your society - do you want to go back to your country any time soon?

To sum up, all the problems are fixable by fixing the way you think. You have a lot of control over it and do not need medications to help you (at the present time).