Have you ever asked yourself: "What is it about me that attracts this sort of peson to me, and why am I attracted to this kind of person in the first place?" When we look at ourselves and see if we can change something and do so, then we attract different people to us. Arm yourself with knowledge about "types" who will use you - I recommend a book: "Why is it always about you?" which will make you more aware and open your eyes to these kind of "users" who feed on the nice but vulnerable kind of person who gives and gives.

I know what you mean, but the more I am alone, the more miserable I become, I still believe there is a compromise in the middle somewhere, let me know when you find it