@Pulak0 As a home share host myself, guests can become friends- I've had several guests I keep in touch with. But before you have a chance to get to know them, while you of course want to be friendly, you do need to keep in mind that you don't know them at all. Having strangers in your home when you are there is quite different from them being there o their own when you are thousands of miles away.
I've had great guests who have been totally respectful. There's a couple of them I wouldn't have any qualms about staying here if I went on a long trip, but I got to know them pretty well because they stayed with me for 2 weeks and we keep in touch. But unknown guests, even if they aren't purposefully destructive, can break things by not using using them properly, trying to force a key that's not turning easily, spilling things on the carpet or sofa and not bothering to wipe it up, using your best knife to pry open a lid, and so on.
Everything could go totally smooth, but it would be awful to come back from a lovely, long trip and find your home in damaged disarray. I've read plenty of posts from hosts that happened to.