Am I Latvian?

I left Latvia when I was 4 and moved to the UK. I used to be able to speak Latvian but I have forgotten how to (I am currently trying to relearn it). Most of my family's first language is russian despite the fact we have never been to Russia and have no family there. All of my family is from Latvia/Lithuania. I used to be confident in saying I am Latvian but I dont know if I am allowed to call myself that anymore.

My question would be if I am still considered Latvian?

EDIT : Thank you for the responses. I feel a little more sure of myself now.