That sense of emptiness will pass with time - so allow yourself
to realize it, and then to fill it in ways that are happier for you.
I remember when I was younger and had to tell a trouble-making
young male that I was breaking up with him and that I didn't want him to come around to my house any more. I was very clear.
Then I focused on my schoolwork.
Then later - on career.
You can build a much better life for yourself.