Is worring about weight gain a good thing/bad thing?

Hello, this is open to all.
Okay, I’m only 22 years old going on 23 soon & I’ve always been skinny. I mean tat literally, I was a hospital baby plus I was a certain diet for awhile til I was older, then I did do sports in middle school & high school. But when I was gone for institute life for 2½ years I didn’t do sports (this place wasn’t a university) but I did walk around a lot or mainly to my destination. But I’ve been home for about a year and some months. I haven’t been active as normal..i love working out when I can! Feel so damn refreshed after! As for my eating habits, well, that changes a lot. Cause it all depends on what is in the house.

But I’m trying to at least do stretches or a small workout in the morning when I get up. It was working for awhile but then I got lazy, distracted, or stressing out something ( I do have a bad tendency to overthink & stress out on certain situations). I do have a lot on my mind this year & it’s annoying that something’s I can’t take into action til I get a damn job! (job hunting is so damn annoying)

I’m sorry, I’m rambling. But I just worry that I may “blow up” as my friends use to say in school. They would tell me to be happy I was skinny for I would get super fat when I get older or that I need to eat more or etc. For I’ve noticed I might be gaining a bit on my stomach..but it does worry me though. I say this because I’ve never really shown my figure! I’m slim with hips but I’ve always feared showing it off. I always wore baggy clothing in school & got mistaken for a boy, I didn’t like wearing fitted clothing because I didn’t like hearing people question why don’t I wear “those” type of clothes more or show my figure. Well when I was younger people were having sex a lot and showing off way too much damn skin! I was raised extra old school and showing too much was a no.

So I’m just wonder am I missing out on showing off my figure? I’m not looking for some lover or anything…im just scared to think that one day I want to look nice just for me and show off my figure..an well..its just too late. I don’t have the shape anymore…I like being my scrony self…I guess I just don’t like change.

I’m really sorry for rambling..an sorry if this doesn’t make sense..sorry. You can reply if you want..