Regret it. Nothing ventured, nothing gained. I'd rather know I had the courage of trying, and failed, than be tormented by what ifs I gave up on.
I'd rather do something and regret it then worrying about what could've happened. How the fuck would I know what would've happened if I dont do it?
I'd rather have regrets because I have too many moments in my life where I DIDN'T do anything, and am constantly thinking "I should have done that". I have too many 'What Ifs', and they are worse than regrets from actually doing something and then later regretting it, in my logic. Because at least you tried, gave it a shot, or learned something new or gained a lesson from it. I'm stuck wondering 'Why didn't I just do that?' all the damn time and I gain nothing from it except some self-loathing, frustration, and feeling like I lost a meaningful moment.
Ultimately, it's about which regrets one prefers: the ones of over something done, or something not done. What ifs aren't any easier to deal with.