What Am I Doing Wrong? [17M]

This is a long post btw hehe.

I'm currently a senior in high school and I've made three attempts at love that all failed. First was my Sophomore year where I talked to this cute white girl. Btw, idk if most black guys are like me but Im really into white girls for some reason. Anyways, I got her Kik, when that was a thing, and talked to her more. It got to a point where we would hug every day and she would say love you. I didn't realize I was being friendzoned at the time. A few weeks in I decided to ask her out only to be told "I have a boyfriend". In retrospect I find it weird how close she was to me when she had a boyfriend. Attempt #2 was the beginning of September last year. I knew this cute blonde girl since my Sophomore year and thought I'd give it a shot. This time i tried to be myself and I've been told how overly nice and kind I am so I acted as such. I started texting her on Facebook messenger and we had some pretty decent conversations. She always said I was a nice guy and very cute. I saw that as a sign to ask her out. When I did she said I have to think about it. I didn't give up until later on when I found out she was trying to get back with her ex. I tried to say thoughtful and caring things when talking to her but it felt like everything was an "ok" and then It went over her head. Attempt #3 started last month and ended within a week. Ik sad. As they always start I noticed this cute brunette sitting at a table besides mine in Study Hall. One day I went to her table had a short awkward conversation and that was it. Since she always seemed busy I asked for her number and started texting her. That's when i messed things up. I started thinking to far ahead and texted her about being more than friends which resulted in a "I'm not really looking for a relationship but we can still be friends" I feel stupid about this one the most. The last girl is the only one I still text and talk to. I just feel like it's awkward ever since I texted her that. The thing is I've always seen myself as a "decent" looking guy who's a little chubby with a really nice personality. Is there something im doing wrong or not learning from in order to date?