<human>: Can you condense the text into three sentences or less?

So my girlfriend [18/f] and me [18/m] have been in a long distance relationship for 5 months now. We've seen each other and been together a scarce 3 times now but are planning on meeting more in the future.

I actually truly love her, but sometimes I tend to forget this.

So last night I was at a party and my ex-girlfriend was there aswell. I was extremely drunk and somehow my ex-girlfirend left together with us, heading to another friends house.

there we made out and dry humped and stuff (I will not go into further detail though), we even spent the night in the same room.

I desperately want to tell my girlfriend because I cannot live with the mistakes I've made and I am also convinced that she has the right to know. I just respect her way too much to keep it a secret.

I do not know however how I should start. Via which medium I should tell her and I have absolutely no idea if she will forgive me, as her last boyfriend cheated on her multiple times (with him having sex with several other girls) and she is extremely vulnurable in this topic.

I would really appreciate any headers, tips, advices, anything. thank you!

P.S.: I still love her more than anything. Now that this has happened I'm even surer about that. I don't want to loose her!
<bot>: I cheated on my long distance girlfriend of 5 months and have no Idea how I tell her (I still want to be together with her, I love her)