Here's the thing. If a guy starts hanging out with you before he likes you it's ok. If he asks you out and you say no and he still wants to be friends and is fine and doesn't bring it up again it's fine. It's only when they get mad at you god saying no. I feel like a lot of people forget this.
Nothing lasts forever. So live it up, drink it down, laugh it off, avoid the drama, take chances and never have regrets, because at one point everything you did was exactly what you wanted.