If you are going to lend the money then do it with no strings, dram, retributions and no guilt. DOn't go into any wheres and whys, just state your terms clearly, i.e.
'Hi H
I have been looking at my finances and I am able to lend you $600 for 4 weeks. The full amount will be due back to me on.../ this will be paid in weekly installments of...
Let me know when and where you want the money transferred.'
I wouldn't make him come over to collect it personally, that will make him feel small. Just do it in a neutral way.
Or don't lend him the money and just say you don't think it would be appropriate for you to lend him money.
That's my take on it. I know I am biased at the moment Ms M but protect yourself in this, you are the most important person.
