1. Constantly calling you on the phone.
Absence makes the heart grow fonder. Except, in this case, constantly calling you, texting you, asking your whereabouts is rather annoying. You should not get bogged down from living your life just because you have to text him every 23 seconds and inform him of your whereabouts. Some concern is ok, but too much isn't. So get a life.
2. Making you feel guilty.
Sure, everybody has baggages, things that they hope would be ignored. The problem is when your boyfriend keep on mentioning it just to make you feel guilty so that you keep on nodding your head whenever he gets angry at you. If your boyfriend really loves you, why should he be mentioning about the past? He is with the current you. If he keeps on mentioning about the past, ask him to meet Dr. Emmett Brown, last I heard, DeLorean is still with him.
3. Using exes as an excuse.
This is somewhat related to number two, someone who is still stuck in the past. A guy who narrates a sappy story of him and his ex is just pathetic. The trick is to cry out loud that his ex did bad things when they were together, so he is being overprotective now because he is paranoid and not wanting the same thing to happen again. Remember, this is an old trick that guys use, don't ever fall for it and thinking that it is ok to put up with a guy who treats you as if you are his ex.
4. Has no respect for your family.
Sure, being in a relationship makes you feel like there are only you and your boyfriend in this world. But remember, the world does not revolve around you two. There are other people too, such as your family. Your boyfriend should know how to have a good manner when he is around your family. If he behaves like a total ass with your family, expect the same when he's with you in another 10 years.
5. Hitting you on the pretext of correcting you.
Let's face it, we are no saint. Once in a while, we make mistakes. But if making that mistakes entitle you to be hit by your boyfriend, then you better get out from the relationship. He will say that he wants you to learn not to make the same mistakes but if it leads to bruises and broken bones, that is not teaching, that is abusing. You better get ready with the pepper spray.
No matter what the reason, guys who act like a total douche should be dumped. Women who are still stuck with this type of men are either very loyal or too dumb to see. Though I hate to admit it, I think it is because of the latter. Love makes you blind, eh?