I have had a crush on this girl for 5 years but can’t seem to get anywhere

So as the title says I have liked this girl for years however, I can’t seem to get an idea of wether she’s in to me or not… a lot of th...

So as the title says I have liked this girl for years however, I can’t seem to get an idea of wether she’s in to me or not… a lot of the things I say she laughs at I would say the we are very close since we have talked about weird things in the past. I have been close friends with her for about 3 years. I want to ask her out but she’s said to me previously how she feels as if she’s to young for a relationship (we are both 14) and I respect that which is why I haven’t asked her out, however I feel like she won’t say yes because of my appearance, I have being going to the gym for around a month now to improve my appearance. Should I just give up and move on from her??