Scarleteen

I had unprotected sex with my partner most of the times. It's been more than one year since I have had sex with anyone. Is there any possibility that I might get STDs or STIs if I get intimate with some another person?

Hi there, welcome to the boards.
When you engage in physical intimacy involving genitals, especially unprotected sex specifically, there is always a risk of getting STIs. The risk exists even when you're in a relationship, and even if you're not having penetrative sex. That being said, always use protection when you're with a new partner and get tested before starting to be intimate, and again a few months in, before starting to have unprotected sex.