Is she interested in me? Please help! *LONG QUESTION*

Hi. I am a 13 year old guy who is crazy in this girl. She is beautiful, kind and allways makes me happy. It's like I am going to stop breathing and die whenever I am close to her.

We have become close friends now, hell, I might even be friendzoned.
Anyways, I am almost positive that she is interested in me. I hope so.
1. Whenever we are going to hang out, as soon as she sees me she allways brightens up and says something like "Awwwh I knew you would come "
2. 90% of the time she sees me (not in school, on our free time) she usually runs up and hugs me.
3. It is kind of hard to describe, but one time at this youth center* (read bottom) me and one of my other friends was sitting watching some funny videos on Youtube, when she walked up to us, said hi, and sat down on a chair right next to me and watched aswell. We were having a great time. And then, suddenly, she just started to hug me and rested her head on my shoulder as we kept watching it and laughed together. My heart went all crazy when she did that, it was like torture! I didnt know what to do :S
4. Whenever she gets the chance to hang out with me all alone, just the two of us, she allways takes it.

Is this girl really interested in me?
And, well, the thing is, I feel very insecure because I am ugly as ****, and I am sort of overweight aswell. (Ok, well, it's not like I weight 176 pounds/80 kg, more like 55-60)

Thank you! (Please no trolls.)

youth center: a place where all age 13+ kids go to hang out to play board games/computer games, take a snack, sit down in a cough and hang out, play billiard/cue etc.

*I am deeply sorry if I posted this in the wrong place or whatever, it's my first time using it *