I cheated and don’t know what to do

I recently cheated on my boyfriend with a friend and I was honest and owned up to it. Now when he talks to me he looks at me like I shot his cat. I don’t know what I can say I don’t know what I can do.

Is there anything I can say or do to make this better.

After five years of being on and off I ruined everything.

Can it even be fixed?