I cannot tell you, obvs. My perspective is as a MTF trans person, so bear that in mind.
For me, my exgirlfriend point-blank asked me: Do you think you are a girl? Suddenly most of my life made sense. I said: Maybe?
Are you trans? I cannot tell you. What I can tell you is this: find a therapist. Find a omeone you feel safe with talking about your identity. Will they be able to tell you? No. But they can help you navigate this field.
I wish you luck!
Do not be afraid of discovering that you are not trans. It’s ok! You have a community within the LGBTQ folks, no matter what. Listen to your heart.
It’s not quite as simple, but one of the thoughts that confirmed it to me was “if I had a button I could push, and overnight my body would change to an ideal body opposite my gender, and I woke up knowing the social norms and being treated exactly as that gender was, would I want to do that”?
Once I realized I would, the question just changed to “there are health and social concerns that come with it now, it takes forever, and you may never hit your idealized image. Are you still in?”
Once I realized I was, it was just slow steps to test the waters. Change my online profiles. Go by a different name. Start to ask for my pronouns to be different with my friends and family. Eventually I’m on HRT.