TIFU by forgetting to save a number

Not exactly today (this week) , but while sunbathing on brighton beach, and aquainting myself with an extremely cute attractive guy, i had to leave at a certain time to check into my room. When the time came after id say at least an hour of chatting, i headed off, and barely got off the ebach before knowing i couldnt just leave this as it was. I turned round and headed back over to his spot, i told him how much of a lovely time id had chatting with him and asked if i could leave him my number as i still had another day or so before leaving the area. I put my number in his phone, and we kissed. I toddled off absolutely buzzing because the whole experiance made me feel great and i was really hoping we could catch a drink or some food before i left to go home. So the next 2 days pass and i dont hear a peep out of him. Then i realise, in my nervous excitement i typed my number into his phone, didnt call out, and didnt save it. I felt like an absolute idiot when i realised and feel like id blown an opportunity to make a connection 😕
I get that theres always the chance he was never going to call me back, but im pretty sure i made it impossible either way even though im very sure we were i to each other.
I know this also probably seems very low stakes, but for someone with huge self confidence issues, this was a massive thing for me and iv been quietly annoyed at myself since so i wanted to get it off my chest

TlDR, met lush guy at the beach, got so excited i fucked up passing on me contact details and missed out on whatever else could have came of it.