This too shall pass. Or so they say. But I'm sure there are people who would miss you - it's just hard to see when you're really down.
I thought people didn't care a whole lot about me. But after I did something dumb, I ended up in the hospital. It was very serious and they transferred me via ambulance (lights and sirens on) to a bigger hospital, probably the most prestigious hospital in my state. My memory is scant, but I remember coming to, just for about 10 seconds, and my grandmother was there holding my hand with probably 8 or so family members behind her. I had family members driving up from 5hrs away and my mom driving in from 9hrs away. They thought I was dying. And they all came, they all cared enough to. And I thought they didn't care.
It's probably the same for you - they care...people just forget to show it sometimes. Sometimes we forget to show it too.