Sorry you're feeling this way. Actually, believe it or not a 2016 survey found one person could affect up to 115 other people. So, in effect you're like a pebble dropped into a pond. Your life does have a ripple effect on others. Whether you think so or not. While you may think you mean nothing to others. You actually do.
I actually think of that a lot. If I was dead the world would keep spinning, people would continue doing their things, etc. Like you, I don't think my demise would be a big loss to the world.
I don't really know what to say. But I just wanted to let you know that you're not alone with this feeling.
IMO though, any person's suicide would affect someone else one way or the other, whether he/she knows them personally or not. The person who finds the body would be affected, neighbours would be affected, the shopkeeper whose shop the deceased frequent would be affected, etc.
I was maybe a little too simple in my statements. I guess what I'm saying is not "no one notices me so i guess I should kill myself." I guess in a simplistic way it could break down to that. What I really mean is I feel alone. Also I struggle at times with the will to go on. Sometimes the thought those I would hurt if i left is a good motivator to keep on going. When i'm struggling already and I look at life and it seems like my existence has little bearing on the lives of others it makes that struggle harder. I understand having others know you and or like you is not a requirement for survival. I'm not talking about being known or liked. There are plenty of people who know me and/or like me. The question is does my existence matter, is it important to anyone? This also isn't a requisite for survival but it makes the fight easier.