Sorry to read about your experience hon. It happens to many people and I can admit that I've experienced this myself in the past. Some things I've noticed that seem to be indicators of these types of men/women are:
1) They give you constant attention...it seems okay at first..but it is actually obsessive and clingy later.
2)They're sensative...which also seems endearing at first...but there is a difference between sensitivity and being super sensitive. It takes a while to grasp what is normal sensitivity and not normal sensitivity.
3)They pull emotional mind games..needing proof of your love..devotion..etc..
4) Look at their family life history and how've they've handled their responses to their family conflicts. Family "Bagage" and dysfunction can clue you in to possible problems if the above 3 other issues are present.