Underweight but I feel fine🤔

I’m 5’5 and about 96-100 pounds (it varies) and I feel perfectly healthy. I have an extremely hard time gaining it, I’ve tried for the past year with different diets, and even just eating tonnnsss. I look too skinny which I don’t like, I’m very self conscious about it, but overall I’m healthy. I don’t feel sick at all, and I have a good appetite. Do you guys think I should continue different diets, or just eat and let my body do it’s own thing?🤷‍♀️ I’m not really sure what to do anymore.