I need to think about my needs

Seems that every time I try to think about other people's feelings I just burn myself. People take advantage of this and I end up the fool, maybe it's time I started thinking about myself and my needs first, isn't that what people are trying to remind me every time I'm being left to hang? I know it sounds selfish but I'm just tired of being screwed over, I know it's a contradiction from my last post. But hey you know?