Yess, I've also been in situations when it feels this way. And honestly - you never know if you are overthinking or this is actually the case, unless you actually ask specific person. We can't read people's minds and right now are just making assumptions.

What helped me is to focus on people who I found interesting - be in coworkers or acquaintances - and talk to them, invite them yourself, maybe initiate a group hangout. If somebody shuns you and invites you out of politeness that's probably a sign you don't connect with this person anyway, so why bother? Instead, take away the focus from "whether they like me" to who YOU like and connect with and this is what's truly important.