Childhood friend until our mid 20s. Good friendship which was later mostly correspondence based with odd meetups. No romantic feelings from him to me and I was a bit swoony as he was v handsome but nothing I ever said or acted on, just mild crushing. We weren't right for each other and I'd never have risked mortifying myself and losing our friendship. Then he just stopped responding to my letters and emails. He'd always been slightly flaky so I kept it up for a while before I realised that there really weren't any replies coming. Checked the address etc. I've got two theories - 1 is that he twigged I slightly fancied him and didn't handle it well so decided to cut me off. 2 is that I know he had a falling out with my brother. Nothing serious they just never really liked each other and it came to a head with a bit of shouting and blaming on both sides (I think my brother behaved arrogantly and I think he was unnecessarily rude to my brother, though I've never expressed these thoughts). Maybe he blamed me for staying out of it, or decided to cut me off alongside my brother? He popped up on Facebook a few years later, friends with some of my friends, and I sent a request and a friendly note but it got ignored. I've left it since then. It's probably 15 years since last friendly contact. I was terribly hurt and sad that he cut me out, but I also miss him and the lovely friendship we shared. He was there for me through some ups and downs, and vice versa. I've recently been in touch with a mutual friend and on the spur of the moment asked if she had a current email address for him and she said yes and has given it to me. She also let me know he's had some mental health problems. WIBU to try contacting him again? You shouldn't give up on people, right?