restrictive to carefree.. help? ?

CeriGrindrod

ok so I just got out of a long term relationship.
At the beginning I was dieting but rather than explain a diet I just opted for the "oh no I dislike that" or "oh no I am intolerant to that".
So after a while, we moved in together and my dieting ways stayed due to me saying I dislike all these things, so my diet was literally tuna salads and sugar free jelly. Whilst training at the gym for 1 hour a day 5 days a week.
Sensible to say I lost alot of weight.
I have recently broken up with him and moved back in with my nan and I haven't touched a tuna salad, exercised nor eaten healthy in the slightest. My weight is creeping up and I can't stop stuffing my face with biscuits, chocolate, crisps, takeaway food.. ect. To be honest with you I thoroughly enjoy a tuna salad and eating clean and I liked my toned body from before but now I don't have the self control to eat clean.
Any ideas how I can get control back??