Why does closeness provoke feelings of entitelment in some?

Why do some people feel that they are entitled to what you've earned whenever you two are closer in the relationship? ( friendships & friendships + lovers, I'm not talking about life companioins )

I experience this with a certain percentage of people in my life. A close friend who refuses to work, an intimate friend + lover who refuses to obtain consistent income. Since I work 60 hours a week and make pretty good money and they seem to always be riding that line of just making, they seem to feel that we should both end up with the same compensation.

They don't seem to acknowledge that we also have different levels of contribution which causes our levels of compensation. I am always quick to help whenever they move, need a favor, need someone to vent on, I always pay for both in whatever we do together, etc. I have also given them money when they needed it due to their refusal to provide for themselves adequately. But I am refusing to continue to give them money now.

I have never imposed anything whatsoever from them as I am very independant minded.

Am I selfish or greedy for not wanting to give them more than I've already given?

Is it wrong for me not to partially provide for an intimate friend + lover?