If you're chasing the whole time then he doesn't need you... not now. Unless you want to break away from this anguish, you may just have to wait until he has need of you.

But do be careful you don't get emotionally drained if he comes back to get some kind of care from you.

You deserve joy and happiness. Distract yourself enough to break away; deliberately concentrate on things you really don't like about him. Continued anguish and hurt will do seriously emotional and spiritual damage in the end, will make forming a new relationship harder.