Is it bad to weigh this much, or am I being paranoid??

I’m 14, almost 15, and I weigh 147-ish pounds (I’m around 5’3). Sometimes it goes up to 150 or down to 146, it just depends. But I see posts on here of adult women who talk about their weight, and mention that they’re around 143-150, and I just feel so bad. Because they’re ADULTS. If they’re 150, why am I 150? Why do I weigh the same as a grown woman? Not to mention that allll of my friends and my older sister weigh less than me. They’re all around 110 or 120. And I’ve tried dieting, and I exercise EVERY day, but still, no changes! And all of my thin, pretty friends have boyfriends or have had one before, and I’ve never dated anyone. And it really just brings down my self esteem, because what if no one ever loves me? If I don’t look good, then no one will want to come up to me and talk to me. So no one will like me. I know it’s so stupid to think like that, but I just can’t help it sometimes. Plus, I get comments from my brother about how I “look like a pig” and how I’m fat (I’ve been called that since the fourth grade by classmates). And I never thought I was overweight until people started to point it out. I don’t know. Am I being paranoid??