2) "He/she SAYS it's different with me, so I'm sure it won't happen with me." I can smell the BS from 100 miles away.
3) "All his/her ex's were psychos." Hmm, watch out if they always tell dramatic stories focusing on how they've always been so perfect...
4) "He/she will change over time/for me." There are some things/traits that people can work on with time, of course. But just keep in mind that "big" personality traits are "big" for a reason, and although certain things about people have the potential to change a bit, certain things also don't. Also, if someone doesn't want to change for themselves, believe me when I say they will definitely not change for you.
5) "He/she is taking things super slow because they got hurt in the past." There's nothing wrong with taking things slow, but there's a certain point where you should start asking yourself questions and wonder if that's just another way of saying they want to keep seeing other people.
6) "He/she won't do it again". Just remember and keep telling yourself this: "fool me once shame on you, fool me twice shame on me".
7) "He/she is just afraid to commit." BULLSH*T. They just don't want to, at least not with you. Sorry.
8) "He/she always takes it out on me because they have a lot to deal with." Don't EVER underestimate or excuse emotional, physical and/or sexual abuse. No matter what they go through, there is no reason to take it out on you.
9) "Haven't seen him/her in over 1-2 weeks because they're really busy." Listen: when someone is into you, they make time for you, even if it's just a 45 min lunch date here and there. If it's been over a week, they're not serious, they're playin', and you should move on.
10) "We're really different but it's a good thing." Get back to me on that one a year from now...