My kids say I'm being selfish but I just want my house back?

My son and I bought a house together. After 20 plus years of giving up my dreams and wants to raise my kids after their father walked out, I was finally getting something I wanted. I had a little freedom and privacy, I could have friends over if I wanted. Then my daughter's crack head boyfriend started abusing her son and she moved in with me.. Now, I am living in the smallest room of the house, with absolutely no privacy. My daughter has put most of my furniture in the garage and taken down my knitting machine and moved my quilting into my room so her kids can have a playroom. I've told my son that we have to help her find an apartment she can afford but he likes having the extra income she provides. But the stress is getting too much for me, between my job and always having the grandkids underfoot and thebills alwaysbeing overdue because somehow, the money my daughter makes just disappears. I can't even have friends over, not that I actually have any left since she's moved in. I just want my house and life back. Am I being selfish?