Just was wondering like why is that?

Why everytime me and my boyfriend break up he never come back im always the one to text him first or call first and why is it that he can go days witout talking to me like a whole day but me ill be tossing and turning missing him waiting for him to text me. On his facebook ill always see his friends go up like if he adding girls each day and when i click on some of the girls pages i see he like all they pictures like what to do leave him? Because i feel unwanted and used.
Just was wondering like why is that?
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