How to move on from bad relationships

Hi, I m new here. I hv been having bad relationships for d past 3 years. Whenever I thought that I hv found d right one, things turn to d worse. I hv been cheated both emotionally and financially. Very men that I hv been with takes thing for granted from me. I wonder why God hv to put me through such pains, again and again. I hv tried to move on but I hv been struggling badly. D men keep haunting me and screwing my mind. I feel worthless and useless. I don't know how long I can cope with this, it has been eating me up day by day. To make things worse, I just had an abortion. I feel so guilty bout it. Can someone pls give me some advice on what can I do?