What did I do to make them leave me?

Nothing. You didn't do anything. 1) If they left they weren't meant to stay. 2) If they left because of a silly reason that just says they didn't intend to stay. 3) Sometimes its nobody's fault, things just don't work out. 4) if this question keeps on bothering you, just confront them (only if they are going to be honest and not just say things to make you feel sad or guilty). 5) Learn from the past, but DO NOT change yourself at anybody's expense.

You shouldn't blame your self for another's decisions they make there choices based in were they are in life them selfs

You cant blame yourself. Sometimes people are not ready for a relationship and they just leave instead of dealing with it. When somebody leaves its not always something that you have done.. it could be so many things but dont place all the blame on yourself.

There is no doubt that breakups are tremendously hard on us. However, the majority of the pain stems back to how our brain functions. Loss of any kind triggers an emotional reaction of “I must have done something to lose what was so precious to me.” It is a completely natural response. However, you must learn to change your thinking. Rather than justifying why it ended, or what you could have done to prevent it from ending, focus on what you’ve learned from the experience. Every single thing we do in life is a learning experience, thus every single thing we do can teach us something. Hard times are inevitable. You can not prevent them. Therefore, you are far better off letting the bad memories stay where they belong: the past. Do not worry about why they left you, do not worry about whether or not it was your fault. You know yourself better than anyone, so as long as you have faith in your own mind and body, you have nothing to fear.

Probably you didn't do anything, they might have their own reasons. If you feel you are the cause try to reach out for them, ask for a meeting, face to face discussion is more helpful than whatsaap or phone calls. I know being left by someone you care about is deeply saddening, and causes a lot of questions that sometimes you find urself stuck because u can't figure out why this happened. Don't blame yourself, be always positive and take initiatives to solve the problem or the misunderstanding. Do your best to bring them back to your life, don't give up and surrender, there are always solutions, seek advice from someone close to you and hopefully you will get there!

you did nothing wrong if you can't really see the reason why they left you. if they hurted you, and the next day they are leaving out of nowhere without giving any signs or reasons, then it might be possible or is the truth that they are actually regretting what they did and are trying to run away from what they did. it happens when people actually want to run away from their mistakes, when they want to run away from their problems, when they want to run away from their problems. if you can't see your mistake, don't try to blame yourself.