How long does it take to mend a broken heart? when it’s been too long when does it start to become unhealthy?

I had a guy break my heart in 2021. The minute I saw him, something took over my body and soul. We worked together for a year then didn’t speak for two, played social media games to get each others attention, started dating, dated for five years then he broke it off with me. I grieved deeply for two years and now am better. I started running into him again because he has to come into my building at work. He also started posting things to get my attention. My head is spinning. I don’t think I ever got over him. Why did he come back around? How long is too long to have a broken heart? I want to seek help but therapist in the past just listen and I get no where. Help

How long does it take to mend a broken heart? when it’s been too long when does it start to become unhealthy?
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