Still think about my former therapist

It’s been a little over a year since I last saw my therapist. We ended therapy because I had to move abroad for work. Since that time it’s been hard letting go of this relationship that was so meaningful. I have journaled, and tried to process it with my new therapist but it’s still hard. I miss him terribly and I still can’t figure out what to do with these feelings. I have no way to communicate with him directly (probably for the best) but I sent him 2 cards( a thank you and a Christmas one) in the post last year, both to his workplace. I don’t know if he received them, I included an email but he didn’t write. I get the therapeutic boundaries and that the relationship is done, but it’s so incredibly hard to accept that I’ll never see or speak to someone who meant so much to my life and was instrumental in getting me through the worst time of my life. Question: will this feeling ever go away or do I just have to get used to living with it? Has anyone gone through it and how long did it take to get to the other side?