This question already has an answer here:
What can I call someone (a friend) who is always asking for favours such as:
- if you are going downtown, can you buy this for me please or,
- can you lend me your car for an hour or,
- if you have some spare time,
- can you post this letter for me please because I am so busy today
He doesn't seem to realise or, pretends not to, that there is a limit to asking for help or favours from other people.