<human>: Can you provide a brief rundown of the text in within 3 sentences?

Me [35m] and gf [27F] of 4 years decided to do long distance but only lasted a 9 months, she said she stopped loving me and we broke up, that was 18 months ago, and I still miss her like it was yesterday.

I am devastated to say the least, I have told her many times how I feel but it has got to the point where she doesn't want to hear it any more and I respect that and I am doing NC. I do everything that you should, go to the gym, eat healthy go to work (although productivity is at an all time low), I go on dates but I never feel like dating anyone past a few dates. 

I have fits of despair and loneliness and extreme longing for our relationships, its been 18months and I feel I should be over it now, but I am just not, it never seems to be getting any better, and I want it to be done so much.  I have seen a counsellor about 4 months ago but it didn't do much and I am booked in again in the hope it will, but can any one offer advice? Thanks
<bot>: 4 year relationship ended 18 months ago, still in agony despite doing NC and all the right things like eating healthy and exercising, any advice?