I have to agree with you. I think social media, for whatever other value and benefits it may provide, has degraded our concept of relationships.
Recently I have been scaling my Facebook “friends” back to well below 100 – actual family and reasonably close friends. I find Facebook to be a useful, though imperfect, tool if I use it carefully. It is oh so easy though to get sucked into using it carelessly.
For what it’s worth, I really don’t like Twitter, and don’t “get” Google+.