I guess I'll give it a try anyway. 1. I will come back often (to hang out) 자주 = often, 놀다 = play/hang out, ~러 = in order to, 오다 = come, ~ㄹ게 (mispronounced as 께) = future tense in response to someone 2. This might be a basic expression I am not aware of, but I am going to break it down at least. Also Naver and Google Translate give different answers. 잘 = well/good, 보다 = see/look, ~고 = and, 가다 = go Edit: I asked my Korean friend, and it is common expression when you're leaving (a store for example). "I had a good look, and now I go" 요 = polite ending ~ = being friendly. The more the friendlier As for the reply bit, perhaps 정말요? 감사합니다~~~ Really? Thank you~~~

(I'll come back often) and (Good to see you) The person is promising to return frequently and saying that chatting with you online is a positive experience. ~ is a tilde. I don't know how it's used in Korean. How should you reply? It depends on how you feel about this person.

I almost understand it, but I am afraid my answer might have been misleading. Though when it comes to the symbol ~, it is used to indicate friendliness. The more, the friendlier.