I Think I’m Trans and I don’t know what to do

I am a male in high-school, and basically all throughout my life i have always felt like a girl and have never wanted to be a boy, so much so that it even makes me sad and when i was younger even got angry that i wasnt a girl. I looked into being transgender a bit a few years back, but my mom discouraged me from it and a friend of mine at the time did too, who was also trans. I voiced my insecurities and fear to transition to them and they basically called me a liar and said that “its called pride for a reason”. I’m still kinda shocked by that, but it doesnt really matter anymore. I don’t know what to do, its been an issue my whole life and I feel like I’m at a place where i can stop and see whats going on, but I don’t know what to do.