It is more how an adult would write it, with huge confidence issues and sensitivity.
Exaggeration is normal to a degree, its when its very obvious that people question it. I feel your issue with this problem isnt so bad, just pull back on the level of exaggerstion us required, the fact your BF mentioned it feel like you want to crawl under a log!
we can never underestimate the positives of getting counseling. See your GP. Even group therapy can help. I hope you bf goes with you.
The first step in any recovery is insight, awareness that there us indeed a problem. But a step back will result if nothing is done.
Place "low self esteem" in the search box above.
By the way' trying to be like "everyone else " should not be your objective. Becoming yourself is your aim with minor adjustments to remaining within the boundaries of acceptance.
You'll be fine. I got counseling in 1987 and use that teaching every day.
There is a thread here that you'll benefit from if you posted there. Its ongoing.
Put in search bar-"do you like yourself? Comments welcomed" I just posted there.
Good luck. Repost anytime.