Hi Susan,
You should allow this break to happen.
Do not try to contact him.
If you try to contact him to tell him that you regret your behavior, you would only make him want to take an even longer break.
This is the time that you need to spend building up your sense of self.
You should spend this time working on yourself as opposed to trying to get him back.
That is what he wants you to do.
If all you do is keep trying to contact him in an attempt to get him back, he will know that you are simply being desperate and this will turn him off even more.
He would know that you haven’t done any work on yourself and you are simply trying to get him back so that you don’t feel alone or neglected.
The amount of time he will need depends on how much time he thinks will be required for you to make some changes when it comes to your sensitivity, moodiness, neediness and depression.
Being that the both of you have been in a relationship for over a year and this is the first time that he is asking for a break, it is likely that he will try to reconnect with you within thirty days.
However, in order for this to happen, you have to make sure that you do not try to contact him.
To have any chance at saving your relationship, you will need to put in the work on yourself.
Know what your strengths and weaknesses are.
Work to strengthen your positive characteristics and eliminate your most profound weaknesses.
This is not necessarily the end of your relationship as long as you do not initiate contact with him and you use this break to put in the work on yourself.