I don't trust human beings and I don't trust love, they don't deserve my pure love and dedication

People whom l have loved have always betrayed me or used me or wanted more and more from me. I have killed my demands and desires while fulfilling their wish then they thinks like they are something top and I am something low so that I might be doing that then they start to humiliate me, making so much demands more than I can fulfill because I have never ever demanded anything from my loved ones because I have always thought that you should always give more than taking from the loved ones.