Oh yes many times. The most recent heartbreak I had was because of love at first sight. I always keep my eye out for free dogs on Facebook and such so they don't end up in the wrong hands, I'll have a rescue help me find them a home while I foster them. Last year I found a great Dane Weimaraner mix he was about 10 months old. got bigger than they expected him to get... When I saw him I instantly fell in love. He was such a kind, goofy, interesting, happy guy. As soon as I met him I knew I had to keep him in my life. At this time I was planning on buying a female great Dane in a few months and I didn't know what to do. I eventually decided to go with my original plan of buying a Dane and find him a awesome home. Over the next few months we bonded and got to know each other, I worked on some obedience and basic training with him, we slept together but didn't do anything sexually. After a few months I eventually found him a great home, they checked all the boxes and I felt comfortable leaving him with them. As soon as I got back from dropping him off I felt instant regret. I was heartbroken, I knew I made a huge mistake and there was nothing I could do about it. I was depressed for a long time after that, I still kinda am tbh. I miss him so much, we were definitely in love. I just wish I would of followed my heart. I learned to never ignore the way I feel and to always follow my heart. If you fall in love with someone there is only one of that someone, no one can compare to them and no one can replace them no matter how hard you look you will always love them. At the end of the day he will always have a place in my heart and I'm just grateful I got to meet him and help him out.