How do you get over feeling insecure about your dick size?

I know that this is a pretty common insecurity for guys, so I figured that I’d ask. I’m almost considering just being celibate and not having sex. I can’t get over the fact that I have doubts over whether I could actually even pleasure a woman, let alone give her as much pleasure as another bigger/better guy could. Then there’s the fact that a lot of women nowadays are saying that girth is really important, and I don’t know if I have enough to be what they want regarding that.

I do also worry that women might lie about how they actually feel about a guys size to “not hurt their feelings” or something like that. I don’t really know how to improve on this mindset.