Is it normal to have a relationship like this?

my first and only girl friend was 4 years younger than me.
i was 17 and she was 13. we would write notes to eachother
during school, even though we didn't go to the same school,
we would see each other at the end of the day for a moment
and pass our notes, then get on our bus. we did this for
quite a while well we were together. i first met her from
my sister. she went to the same school, and my sister said
she had seen me before and that she liked me. so one night
my family and her were going to chuckie cheeses for my
sister's birthday or something, and she sat next to me in
the car, in the back. i asked my sister beforehand if she
was sure that she liked me and she said yes. so when we
were in the car i would scoot closer to her because i felt
that's what she wanted. she moved further away from me,
but later told me, she thought i wanted more space.
i remember she came to spend the night one night, and we
were watching some movies on my couch. we were holding,
which made me nervous, but i moved her hand across my
stomach and she started rubbing my stomach, i moved her
hand lower, and lower, and lower...and she didn't seem to
mind. i eventually felt her hands touch my pubic hair, and
moved it towards my penis. she kept touching my penis
and didn't seem to mind. she was very bad at it, but it
was the first time a girl had done that, so i was happy.
later before it was time to go to bed we looked at
eachother and then started wildy french kissing. we had
talked about kissing before, but now it happened.
i remember i accidently bit her tongue, but she said she
liked it. we weren't allowed to sleep together, so i had
to go to my room while she slept in the living room.
i remember waking up early in the morning before everyone
else was awake and laying with her. we would go under the
covers and talk or spoon. she would reach in my pants on
her own and touch my penis now. i remember rubbing her
jeans where her vagina would be, but she kept moving
back, so i thought she didn't like it and i stopped.
i later found out she liked it and wanted me to go under
panties and touch her clitoris...damn!...we both agreed
to never speak of these events, and our parents still
don't know more than a year later. once she had farted
in front of me on accident ofcourse, but i heard it. she
kept laughing at it, so i didn't really know how to react
and i kept quiet for a little while. she started making
up excuses, like saying it was her phone, but it definately
was not. i didn't care about the fact she had done it, but
the fact that she was lying right in front of my face.
she still has not admitted to this day that she did it, but
whatever...i wanted us to see eachother naked once, and
mentioned it to her, but she said she wasn't ready. i
think she was just embarassed of her body, because she was
overweight. one of my sister's rude friends would always
bring up why a skinny guy is with a fat girl. i ignored
her but my girlfriend wouldn't let go so easy, and just
stirred up more crap. i remember when we were under the
blanket i had reached under her shirt and felt two lumps
which were supposedly breasts. i felt disgusted. later
she told me that she had some skin condition and had alot
of small bumps all over her body. i was more grossed out
now. i wasn't perfect but, i felt ashamed to call her my
girlfriend now. not only did she have crooked teeth, and
a bad hairdo, but she was also very immature and laughed
about everything, and her laugh was so annoying. eventually
we broke up. i felt ashamed and disgusted to have wasted
my first kiss on her.