[MORE / IMPORTANT UPDATE]

I just re-read his email. I will write the whole conversation here.

Mina : Happy Birthday! I wish you the best for your future plans, to always study well (hopefully in *** hehe) and make a lot of new friends next year. I hope that everything is well with you & have a great birthday

Ex Boyfriend sent me a heart emoticon (he does not do it very often but sending heart emoticon or emoji is often in Korea when you are close to them as friends or boyfriend/girlfriend – in this context, I think it was just him expressing his feelings being touched)

Ex Boyfriend : Thank you!!! Thanks for supporting me even through my whims and even though I was not a good boyfriend to you. I hope you spend the rest of your summer well, and I would like it if you have fun next semester as well!

My mind was being delusional at that time when I read it first. He did not apologised on his email, I just realise that.

-Mina