Thank him! Even if a lot of time has passed. Better late than never totally applies here. If he didn't remember you before, he'll remember you after. I've give

Thank him! Even if a lot of time has passed. Better late than never totally applies here. If he didn't remember you before, he'll remember you after. I've given thousands of semi strangers advice in various forms. I remember the two or three who followed up with me and said, "thank you for your advice, I followed it and have since reached my goal," and have kept in touch with them. It makes you feel really good to hear that.