ممنون: Thanks خداحافظ: Goodbye These two words are common and you can hear them in everyday conversations. They can also be used in writing and formal speech. دوستت دارم: This one is a little bit tricky. Depending on the context, it can mean "I like you", "I'm fond of you" or "I love you". قربونت برم: Literally means "I shall sacrifice myself for you.", but nowadays we mostly use it a) to be nice to a friend or a child b) in intimate conversations. It is pretty common but be careful. :D از دیدن شما خوشحالم: It is grammatically correct and you may see it in many texts, but the more common form of this sentence is «خوشحال شدم دیدمتون».

ghorbonet beram kind of means thank u and it depends on ur context , and sometime means that love you