I think Mister J was already implying this, but this is an incredibly ironic thread title, especially given your recent posting history. But then, what can one do but ask other people about how to handle the opinions of other people right?
I have a suggestion for that actually. I’m going to go out on a limb here and assume that you are Jewish (I know; call me crazy). That being the case, you may be interested in the views of a Jewish writer with whom you may not be very familiar. I quote here:
If any of you lacks wisdom, you should ask G-d, who gives generously to all without finding fault, and it will be given to you. But when you ask, you must believe and not doubt, because the one who doubts is like a wave of the sea, blown and tossed by the wind.
Whatever you may think of the source, I believe there is wisdom here for any believer in G-d. While I know our own insecurities make it hard to adopt such an attitude in the face of society, the only person whose opinion matters in the end is G-d.
While this may seem in some ways to be a very philosophical and fancy way of saying “not giving a fuck”, I think the real issue here in a practical sense is getting your priorities straight. Even if you are not a particularly religious person, the idea here is that you need to first make the decision of choosing what is of primary importance to you, really. Once you’ve made that decision, try your hardest to see everything from that perspective, and not the perspective of others.