My relationship 'damn it sucked'

My name is Maurits, im 15 yrs old and live in the Netherlands. i have a 12 year old girlfriend in england.
My girlfriends name is hannah, i met her on the online chat game IMVU. she claimed to be 16 years old.
after a month i found out on facebook that she was only 12, but i loved her too much to even care.
in the beginning we've had a few rough times because her ex's kept coming back for her, and she had to choose between me and them. all i cared about was her feelings and never saw how these situations hurt me. in the end she always chose for me and not for her ex's, and so we stayed together. she had this bestfriend aswell who's name is corey.
she fell inlove with him, although she had me and so he kept telling her to go on with me and not with him.
but they kept on saying things as "i love you hun" to eachother. even tho it hurt me really badly, i couldnt leave my girl because i loved her too much.
but she loved me too much and decided to just b friends with him.
afterwards we had a big fight and it ended up with some rules.
we promised we would never lie anymore and that we would tell each other straight what we think

Then when i went on summer vacation her friend told me she was cheating on me twice, and one hour later she told me about it.
she said that she went out with one guy for 30 mins and that another guy kissed her while she didn't want to. i heard her crying an forgave her because it was obvious that she regretted her actions. i tried talking to her about it and asked her if it would ever happen again. she said she didn't know. she said it would be hard not to cheat on me, but that she probably couldn't hurt me like that again. 1 month later she told me that she loved me sooo much and more and that she promised never to cheat on me anymore.

Our relationship has been without cheating or any fights from that point which is about 3/4 months ago now. she gave up her flirty attitude towards her friends. and i feel more comfortable in this relationship now, although things that happened in the past broke part of my trust.

When i told my friends on school that i was going out with a 12 yr old english girl, they started spreading it and everyone started calling me a 'pedo'.

im now living my life for her because in the last 3/4 months she's been soo sweet and proved to me that this relationship was finally worth something and that she could change.

There is a lot more, but im not going to tell y'all any more.
So as u see i've been through a rough relationship, but i now know how i should have dealt with it and im ready to help people with their problems. i've been helping alot of my friends with their relationship problems aswell and i thought maybe i can help more people.
I like helping people out, and so im here to help, no matter what problem, i will always try to help :)

Welcome to the forum, but unfortunately you're too young to be able to provide any real advice or insight on relationships. Honestly, a 15 year old dating a 12 year old is nothing more than a simple adolescent relationship, neither of you really understand love or what it means. and even though you mistake emotional development for love, it is likely far from that. Asking a 12 year old for a committed long-distance relationship is simply absurd.

That said, read the forums, learn what you can through the internet, and maybe you'll be able to apply it to life going forward.