Should I go back to him/her?

This is a very subjective question, firstly if you have this thought make sure you talk to the person in question. Also, ask friends and family to confirm what you remember is not exaggerated or understated. Before doing anything put a day in between doing anything to give yourself time to think.

That's something that you truly need to ask yourself. What was the reason that you left? Has that changed? Has anything changed within yourself, within them, within your relationship that would make it better this time?

It depends on your relationship, you know if it was a healthy or unhealthy one. If you spent your time with him/her worrying or arguing and being unhappy then you should really ask yourself whether you are better without them.

This decision is based on your experience with this person. If they bring a positive feeling to your life, it may be a good decision. If they negatively affect you, going back to them may not help you or them. You are the expert on you and your relationships. The right answer will com to you.

I've had Obsessive Compulsive Behaviour and Depression for a long time and overcame both, mainly by using that energy in a positive way for my life.

That really depends on the situation and everything that is going on. Also, I can't make that decision for you.

If you love him/her, then yes, you should. If you really enjoy their company, if you really feel a deep passionate love for this person, then go ahead.

I believe a general rule to follow when making a decision like this would be to reflect upon your experiences with the person. Think about the good times, and the bad times. After that, I think it is important to decide whether the good outweighed the bad in your relationship, or if there is evidence that your relationship would have the good outweigh the bad in the future. It can be tempting to go back to him/her because of the painful separation, but it's important to think logically instead of emotionally, and hope you make the right decision.

There are so many different factors to consider. Ask yourself all the pros and con first and then spend sometime filtering those down.

Depends on the reason you broke up. Then think if you would be able to be happy knowing why you broke up