I feel alone and that feeling stays with me when I'm with friends or at school. At school I'm by myself almost all the time cause I don't really have a lot in common with the other students and it makes me feel more alone and at home I don't have any brothers or sisters so I don't have anyone my age to talk to and it's hard so am I alone

You are not alone in this world. And if you are a bit different from others that just makes you more unique. Do you have a counselor at school? Talk to them, relate to them how you feel. How old are you dear?

No, you are not alone, it just take some time to meet the right people. By that time will come. And maybe you should list your hobbies and interests and enroll in clubs to find people with the same interests. And also getting a pet can also be beneficial.