Allow yourself the right to grieve this deep loss.
It is a loss.
You have a right to feel sad, hurt, upset, angry, or anything else that is there.

The only way through a loss it by allowing the grief to exist.
Allow it to be full-bodied. Allow it to cause your heart to break.

After you feel what there is to feel around this heavy loss, you will be able to move forward. You will not ever stop feeling love for your previouos T, so don't expect yourself to do that. But you can start to move forward with enjoying each day for what it brings to you.

There will be times when missing her will hit you full force - even years from now.
Allow that to be what it is as well. Honor it.
But the times of heavy grief will become less and less as you move through the hours and the days.