CAN YOU HAVE A GOOD RELATIONSHIP WITH YOUR EXES?

Of course, the answer of this question is different in everyone but, in my point of view, have a good relationship with your exes is possible. If you had a relationship with someone that you love or you matter him or her, this feeling doesn't disappear a day after. So maybe your relationship can't be possible for whatever, but you can be friends because when you love someone always you will matter to this person. 

Also I know that if you ever like one person the feelings maybe are to strong to be only friends so in my opinion I think that the best option is to not have contact with the other person after the breakup but then in a while or the time that they need you can take the contact again and be friends. But always is possible that when you are trying to be friends you remember other feelings and be in love again. 

So like I said before a good relationship with your ex depends on the caracter of the two persons and also on the relation that they had when they were together. 

Finally, I think that the destiny is written and if you have to be with someone you will, so if you try to have a friendship and you end with a relationship maybe it's because you're meaning to be together. And if you're not, you will have a good relationship with your ex and that's a afirmative answer for the question on the top.