Hi Andy, I feel for you - truly do. After you split with someone - as the months/years go by, you cant help but think of moments that you shared with your ex partner at all. I have split from my ex for 5 years now and it just takes a song, or a place, or the smallest little reminder and in pops a 'moment' of a time when we were happy together, Im incidentally with a new man now but we would not be human if we didnt reminisce - we all have fond memories.
I wish you luck. You'll be fine.
RQ xx