Should I burn all of my bridges?

My "friends" are all people I've known since early high school or before. I was best friends with each of them at one point, and I've always hung out with them separately, although some of them somewhat know each other from school. It's gotten to the point that they are either pive aggressive, parasitic (using me and then dropping off the earth), or downright rude (calling to vent about their lives and then conveniently having to go before I can even tell them about my day). Part of me feels like I should keep them around because we have such long histories and being completely alone is social suicide. Burning bridges feels kind of dumb, but I have these urges quite often to just change my phone number and cut every last one of them out of my life. They would talk amongst themselves, but I really feel used and disrespected, because I've been such a pushover. If I try to stand up for myself, they are hostile. So what should I do? I'm probably just a loser who can't offer anything. It's not like I blame them for not liking me, but keeping them around feels gross. Thanks.