you need to look at yourself OP. the problem is you. this is a pattern that has repeated itself over and over again so what are you doing wrong? you probably have bad taste in men. do you wear your heart on your sleeve and ignore all the early warning signs and red flags? the common denominator here is you. are all these men alike? what type of personality are you drawn towards?
each time you get burned your supposed to learn from that and learn what to avoid the next time. maybe counselling would help you to make some positive changes so you learn to spot the bad guys early and also ensure that how you look and act attracts the right ones.
are you too nice? do you have doormat, vulnerable, naive wriiten all over you? are you a damsel in distress type or do you look for a man that you can save or change or fix? are you co-dependent?
what can you change toxptevent this happening again?