I am 3 yrs in the same boat .I honestly feel like i will never get over my ex T .
I have done everything that you have. I've deleted all the emails,text messages, put stuff away in the bottom of my wardrobe in a box or thrown stuff way .I've had extensive therapy with a new T and still the pain is there
I wrote to ex T 6 months after termination to get closure .It didnt work .I wrote pages .....she answered in 5 lines .I felt even more hurt and rejected.
My next move is to see a hypnotist who can, they think, break my attachment with former T. At this point I will try anything !
Hugs if you will receive them .I know how painful it is .I hope you find peace soon .