You can address this mistake by characterization

Even if your characters sound different to you, they might sound the same way to the readers. It does not advance the plot, it does not show action, and it is completely irrelevant to the overall story. A very good example of this is greeting. Greeting is unnecessary, unless there is a reason why one character refuses to greet the other, or greets them enthusiastically.
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Lashunda:
I tell him what's wrong, and then he starts trying to comfort me.
(1 October 2016)

Lashunda:
But one day he blocked me and I was so upset about it because he was the only solution to my problems.
(1 October 2016)

Lashunda:
During the summer, me and him were texting each other after the last day of school.
(1 October 2016)

Lashunda:
We only met in 6th grade, now we just hit middle school.
(1 October 2016)

Lashunda:
H is always making me feel better, because I was a very emotional girl that year.
(1 October 2016)

Lashunda:
He uses all of these solutions end even more to try to comfort me in the dream.
(1 October 2016)

Lashunda:
While we are there, I cry continuously and cant stop.
(1 October 2016)

Lashunda:
These affects cause me to have a dream that me and him are trapped in a haunted school.
(1 October 2016)

Lashunda:
He's also rubbed my back once and hugged me a couple of times.
(1 October 2016)

Lashunda:
My crush(lets call him H), always pats my head, shoulder, and my back.
(1 October 2016)