I got emotional and made mistakes?

me and my ex were talking on fb, and she has started seeing/talking to another guy. She doesn't know I know but I got really upset and angry and emotional and made references to him about things in his fb profile. I shouldn't if even looked and I regret making these 'hints' to her now. I'm pretty sure she knew what I was getting at.
i also liked a lot of 'love quotes ' etc which now I feel stupid for but I was / still am so much in love with this girl when I find out it was like losing her all over again.
im now beating myself up about it all and feel really stupid.
is their anything I can do? I've gone quiet now and left my ex alone. I wouldn't of even spoke to her because we hadn't for two months until she contacted me.
I got emotional and made mistakes?
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