Returning to friendship after breakup with childhood friend/ ex boyfriend

Hi everyone I'm new here.
My story is pretty straight forward. I've broken up with my bf recently. The relationship hadn't really developed too deep on romance level. We've been friends for about nearly 12 years and we didn't even date for over a week before he initiated to break up coz he didn't think the relationship would work out now and he didn't feel ready. But he kept on apologising because he really didn't want to hurt me so he decided to just tell me honestly about his feelings early on.

Of course for the first few days I was upset just like anyone who got dumped and disappeared from his life. But surprisingly I felt more hurt not because he broke up with me but because I thought we could no longer be friends. (according to so many people who said that you can't be friends with your ex and you have to go NC). When we saw each other again shortly after the breakup it became really awkward because I could see he was guilty. Later on he just pretended to not see me.

Anyway, after a week I decided to just talk it out with him and told him I'm no longer upset (i'm not even joking....I think it hurts more to lose a friend) etc. I told him that I still want to be friends just like we were in the past coz I thought it was silly just to throw away such a great friend over a week of relationship. I'm not sure whether this is right feeling for the person being dumped? I don't resent because the breakup wasn't over argument/ drama etc and I don't harbour any thought about getting back together with him and we became friends on Facebook again. People around me thinks that I'm nuts because I've recovered so quickly.

Is it alright for me to feel that way? Is it ok for me to want to return to our friendship because I feel that it's not worth losing a 10+year friend over a 3 day relationship? I think it's not really a big deal but everyone around me thinks it is. :tough: