Why is everyone always soooo mad at me?

I would REALLY appreciate any opinions you have becaseu this is starting to drive me insane.

I try to please people. Sometimes I feel that I never do anything for myself and EVERYTHING I do is just what everyone wants me to do. (This includes family, boyfriend and friends.) Yet, I cant please everyone all the time because they all want different things and they all want me to spend time with them a lot and then they get mad when I am not always available to spend time with everyone.

Now, I realize that I have to please myself first, but I like to do these things with them, but they get SO jealous of each other or something and they get mad at me. Then they act mean and rude to me and ignore me. But I dont understand because if the problem is that they want to spend more time with me, why would they try to damage our relationship and spend less time together?

So my questions are as follows: Is this normal and does anyone else experience this? Am I just being too sensitive? Are they all too domineering and being jerks and trying to manipulate me becasue I am too nice?

Please help. I am a nice person and I dont want to be taken advantage of.