I know how you feel OP but you may have to get used to it. Because both my DDs love to have friends round I have always gone out of my way to arrange it and therefore, 9 times out of 10, the socials are hosted here. It's not always easy, both DH and I work unusual hours and time is precious, but I do it because I actually enjoy having their friends here and I think it's important for them. I'm possibly a bit of a mug as DD1 (11) has started just 'turning up' with a friend asking for a sleepover and I usually agree.
Not everyone feels the same way and with the exception of a few of the kids' friends they rarely get a reciprical offer. I think it's partly because they know I'm happy to do the hosting and they're happy for me to get on with it. What bothers me though is when my DDs notice it and sometimes ask me why they don't get invited back. I know it's not a problem with the kids as I'm reliably informed they are both a pleasure to have round (boast) but some people just don't seem to get around to it.
Sorry for the ramble but it's a bit of a bee in my bonnet. I'm not going to stop hosting though - in a few years' time they'll be spending a lot more time with their friends away from us.