2. Don't do nice things for them. Let them do nice things for you
If you do something nice for someone, it makes you feel good on two levels. You feel pleased with yourself and warm toward the person you've just spoiled. To justify the effort or expense, we often over-idealise how wonderful he is to deserve it! End result: we like the person more. When someone does something nice for us, we're pleased. But there are a whole lot of other emotions that come into play, and they're not all good.
Sometimes we feel overwhelmed. There's pressure to live up to being the wonderful person who inspired such a gift/act, not to mention pressure to return the favour. It's even trickier if the 'nice thing' comes from someone you like very much but aren't sure about yet. Got the point? When we're infatuated with someone, we're desperate to do nice things for them. You're much better off letting him spoil you.