Retail will do that, you have to deal with people. I hate it lol.
Even if you did get turned away, they are just people. But I do realize that when you are down on yourself rejection is just another thing added to a long list you have of things wrong with you. Sometimes it can be a breaking point.
That's why I tell people you should focus on yourself, self improvement so you have a good foundation to just shake stuff off. All the stuff will come, your goals will even change. So keep doing you and getting better.
You do have potential, so just focus on that, don't compare yourself to others and be real with yourself. Also don't assume, guys psyche themselves out before the girl can even do anything.