If you have a g/bf, literally HOW?

I think today is a good day for this topic, but yeah I feel like I would be a good enough boyfriend, but I am so shy that I talk so incredibly little therefore I'm just not sincere and therefore can't talk to girls man! I get called "cute" and "sweet" (infantilizing) sometimes by all girls in my hs but that's not being serious about me!! If you guys have experienced the same, how did you pass it? I'm really looking for the next step because I feel I have potential