Scenario: A friend wants to talk with me about something that makes her sad, but she's busy at the moment and wants talk later. I want to express that I'll be pleased to listen to her. Can I say: "Very welcome to talk to you"? I guess it's wrong, but how I can express it correctly? Should I use the word "welcome"?
You are very welcome to talk to me is grammatically and semantically correct, but not really idiomatic or natural. Other ways are: Please feel free to talk to me whenever you have time or I'll be pleased to talk with you or Whenever you want to talk, just let me know and I'll be happy to listen. I wouldn't use welcome.