I'm sorry to hear that you feel that way, no little should feel lost nor lonely. Until recently I've been a little without a Caregiver and last year I made a couple of changes in my life that improved my situation significantly.
You have to show yourself. I know this one is difficult and everyone should do it at their own pace but showing your little side in small doses made a huge difference for me. I started being 24/7 in my flat carrying a plushie or not hiding myself whenever I'm watching cartoons. My flatmates, they don't even know what a little is but they've noticed how happy things like gifting me plushies or giving me a kiss in the forehead before going to sleep make me. And still, I don't let my little side taking full control in front of them (because I'm scared) but still, having those small details already makes a difference. And finding the right people is difficult and takes time and you might get so bad reactions from some people but if someone doesn't like that side of you they are not worth keeping anyway but progressively the right people are going to stay around.
Way easier things that you I do by myself that help is Age Regression ASMR a video about a someone tucking you in bed with you plushies is always good.
Hope my tips help a tiny bit, a big hug for you and a kiss in the forehead for you