The usage of the word “like” Help please

Dear Teachers! Thanks a lot… I want to know the usage of the word “like”If someone says: Do you like me: which are wrong grammar or can’t make sense?1.) Yes, I do.>>2.) I liked you 2 years ago. (Does it imply I‘ve not liked you for 2 years until now?)>>3.) Yes, I liked you since 2 years ago.>>4.) Yes, I have liked you since 2 years ago.>>5.) Yes, I have been liking you for a long time.>>6.) Yes, I have liked you since first time I talked with you.>>7.) Yes, I did. (Does this mean”I liked you before and I still like you now.”) Or (“I liked you before but I don’t like you now.”)