"Alcohol. The cause of, and solution to all of life's problems." ~Homer, the philosopher.

If you're not good in relationships, it's best to figure that out, and accept it sooner rather than later. Also, blaming the end of a relationship entirely on the other person, and going on blissfully unaware of your own issues is a good way to repeat your failures. It takes two to tango, take responsibility for your half of the relationship and your mistakes. Decide whether you want to change those things about yourself, if that's even possible, and be aware of what you do in relationships when picking your next potential mate.