I've never had this experience with a client, however I was a wreck when I split up from an ex many years ago and I just couldn't stop thinking about him, I'd cry just thinking about it while doing my eeekly shop! And yes seeing him helped but it was a temporary short term fix. In my experience I had to finally cut the cord and go cold turkey. No contact. Goodbye forever. And while it was worse to begin with, over time I got control of myself again. I almost felt bipolar, some days I could get about my day and be and others I just could get him out my head.
The first month or so was the hardest and in those months I just kept myself as busy as possible... saw friends, family, watched box set after box set, read books, etc! I also wrote my feelings/thought down which really helped, I felt once I'd wrote them down they left my mind for a while.
I think the best thing long term is to cut all contact and time will be the healer
You got this girl! Be strong :-)