My ex wants me back, should I agree?

My boyfriend stopped talking to me 3 weeks ago without any reason, I called a couple times and he didn't answer. after a week I decided that it was time to give up on him and move on.

but now he started talking to my best friend telling her that he couldn't move on, and that he wanted me back, she told him to simply talk to me and try to fix things between us.
he then told her that he will talk to me when his exams are finished, which is next week.

I want to get back with him but i don't want him to take me for granted and talk to me whenever he feels like it like he did before. what should I do?
My ex wants me back, should I agree?
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