A possible concise summary is:
The user tells a story of how she has been stalked by a boy since second grade. He has called her house, made fake social media accounts, and followed her around. He claims to love her and knows everything about her. She has tried to stop him but he keeps coming back. She is afraid he might kill her after she uploads this video.
Here are the key facts extracted from the text:
1. The speaker has a stalker who has been obsessed with her since second grade.
2. The stalker has created social media pages to express his love or hate for the speaker and to post pictures of her whereabouts.
3. The stalker has been confronted by the school authorities and the speaker's parents several times, but he has not stopped his behavior.
4. The stalker claims to be the speaker's boyfriend and knows a lot of personal information about her and her friends.
5. The speaker is afraid that the stalker might harm her after she uploads a video about him.