What is your honest opinion on this?

I am seeking all and any advice about this constant contact issue that keeps reaccuring on answers,I have been on answers for 2 years now and ever since i can remember I have had alot of fun and met some interesting fun people as well but I also have had some contacts that i have found that just are not stable including some men everytime i have tried to get close to some of the men i have found myself hurt and regretting it Either they are perverts that only wnat to talk to get dirty with or they got serious mental issues.I do not get ti why is this always happening to me? and what can i do to avoid this from happening anymore? also please refrain from any rude comments thank you