I Am Lonely

My head's been totally squiggly recently.. I just feel like it's just me and I'd be all quiet and looking down at times, when usually I'm cheerful and stuff.. Around others, sometimes i jump when they say my name if I'm lost in my feelings and thoughts, and act like everything's fine and smile if they talk to me. Even, when im by myself in my room on my bed, I'd lay there thinking about how would it be if someone who understands me and loves me for me was around, that sometimes i would cry over it. I just feel like it's out there, but guess I'm just spending time alone..