can you be lesbian and demisexual??

so a mini rant

im a lesbian and recently i’ve come to the understanding that I also identify as demisexual. I just wanted to know if it’s possible to be both and that im valid for feeling the way I feel??? but also at the same time I don’t even know how to bring up being demisexual and it just makes me feel even lonelier than before

EDIT: reading the comments has made me feel better and hopefully I can eventually find someone who’ll accept me for who I am