How do I know I should break up with my boyfriend or girlfriend?

If you are asking that question, then there must be something that is very difficult to work through. First be honest with yourself, this is the hardest part. Ask yourself what is it that you are not getting from this relationship and talk to your girlfriend or boyfriend about it. The conversation needs to be very direct. Over-communicate is important and never make assumptions. Be clear which part you are communicating is purely emotional (venting) and which part is the actual issue (this is what needs to be resolved). The end goal is to have an action plan (what will you both do differently as an EXPERIMENT) to resolve the problem. If you feel like there isn't anything neither one of you are willing/can do to resolve the issue then it's time to move on.

Ask yourself if you still love them? If not then you know, breakup with them. Breaking up with them will be difficult. But time will make it better because one day you'll find that special someone.

When you think that you are in love with the memories of him/ her instead of him/her. I believe then is the right time.

The first question would be"are you both happy?"and if not, can you both work out on thé relation ship?

Break down your thoughts into a list of pros and cons of what you like and dislike about them, etc. That list will make things more clear to you as to what you should do.

When you start to feel unhappy or uncomfortable in this relationship. But you know what's best for you.

Well, I think you need to do a bit of self-reflection to answer this question. Are you still happy with your boyfriend/girlfriend? What is it that makes you want to stay with them or why do you want to leave? Try thinking of questions you might want the answer to or make a list of pro's and con's. Honestly, it all depends on you. Are you happy in the relationship?

you shouldn't think of these stuff.. Concentrate on how you guys will improve as a couple and not like this...

If they do not treat you well. The key to a relationship is to always be nice and kind. Dont let it get to the point where it can be abusive. Also if you lose interest, you dont want to continue the relationship.

There are many factors that weigh in to that. Do you feel safe with them? Are you happy with the relationship? Are you happy with your boyfriend or girlfriend? Self evaluation should happen first. Only after you've asked yourself all the necessary questions and are content with the conclusions you've come to, then you can make the decision.