Hello readerlings!!! Flores here. And here is a book about getting advice from me.
Need advice? Because I'm here to help! Just leave your problems in the comments and I will help you.
NOTE: If you need advice and it is urgent, put the words "URGENT...
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My advice: Just say it straight away. If he helped you with something important that you are thankful for, you should thank him for it. Don't leave them hanging.
Also, on how you want to thank him you can use this as a simple example. "Hey (insert his name). I would like to say thanks for (insert your reasons). You're like a brother/friend to me and I really thank you for helping me."