Is it still worth trying if he/she broke up with me several times?

I don't think so. Just imagining if this happened to me, I would question why he/she broke up with me and why he/she kept coming back. If this person wanted to be with me and was serious about it, a first break up most likely wouldn't even have happened. Why does he/she keep coming back after deciding to leave me? Did this person just not find what he/she was looking for in anybody else so then just settled to come back to me? Is he/she wholeheartedly considering my feelings when making that decision? How is this affecting me? Do I feel like my feelings are being played with?

Well, in all honesty nothing is worth your emotional and mental health. If the case with your s/o proves to be emotionally or mentally draining then the answer is simple, it's not worth it. While I agree that relationships require time, patience and effort from both sides, it's not healthy for you to become a slave to your partners change and needs. Talk to your partner, communicate how you feel about the situation, i.e, then breaking up with you several times. They can offer their own insight of the matter as well. More importantly, you'll know where the both of you stand in terms of a relationship. If you think their perspective offers comfort and promise, then give it a try, at-least. If not then give yourself space and time to fully consider whether being with them is the right path for you to take in your life. Remember, sometimes relationships can be a 60-40 or a 10-90 rather than a 50-50. However, the result should always be a 100%

That totally depends on what kind of relationship you've shared so far. IF all the good memories out weighs the bad ones, there's no problem giving it another chance. But make sure he/she is making equal efforts as you, what's the point of chasing someone who doesn't wanna be with you as much as you want to.

To be honest, if you broke up several times, it means there is a problem which remained unsolved. If you solve that problem, you might find the answer.

Yes unless she likes some one else. You should keep trying and not give up no matter what and I hope you succeed

Definitely people make mistakes all the time. Especially when they think it's the right decision. It's always good to forgive and forget. It'll take time but it'll be worth it.

I would try to talk it over again with the person, if you think they are going to break up with you again it is up to you to take that risk,].

No because it means the person is stringing you along, it would be best to find someone new who actually thinks you're worth their time

Maybe. It depends the quality of the relationship.If it is a abusive, stressful relationship that brings negative feelings , I guess no.

If the reasons why you broke up have changed, it's possible it may be worth it. Or maybe not. In other words, will the problems you guys had reoccur? Or do you see yourself in a deadly cycle of breaking up over and over again? Have you guys spent enough time apart to see why you guys broke up, and have one or both of you changed enough to start again? Or is the feeling of wanting to try again an impulse, which might lead to a regretful, hasty decision?