How was your experience in Korea?
It was a great time! I had had much fun. A korean girl host me, most Korean are really kind. I attended to skku international summer semester and I also met many people from everywhere!
However there are some weirdos guys and that was quite shock to me! People used to stop in the street to ask me if I wanted a Korean boyfriend, sex or stuff like that lel это звучит нормально?

'It was great! I had a lot of fun. A Korean girl hosted me. Most of the Korean people I met were really kind. I attended (skku International summer semester - a program?) and I met many people from all over! However, I saw some weird people and it was quite a shock to me! People would stop me in the street to ask if I wanted a Korean boyfriend or to ask about sex and stuff like that.'

- There are mostly grammar mistakes and they sound unnatural but I can understand what you are trying to say at least