<human>: So I don't really know how to go about telling this story, it's a long one...

Last summer I met my now girlfriend on tinder. I really assumed it would be a one time hookup but we really connected. She was pretty drunk when we first met and we had sex. 

We kept talking and almost went exclusive when I got cold feet and backed out at the last second. We kept having casual sex while she always wanted more. 

I disrespected her to my friends and called her a slut I just used to fuck when I really liked someone else, which wasn't true. I also have a very promiscuous past which upsets her. 

About 6 months ago I went for and we became exclusive and started dating. We've since seen each other every day and I truly love her. I think she's the one. 

She has seen the nasty things I've said about her and says she understands, but still throws up when she reads them. I am worried she'll never get over them. She also often guilts me about it and makes me feel shitty. 

I was also very hesitant to say I loved her until I meant it which took a while and offended her. In August, I said I love you in a friendly way to a female friend which really really upset her and she still guilts me and makes me feel shitty about that all the time to. 

When the horrible things I've done come up i always profusely apologize while she makes me feel like shit about it.  We fight a lot but also really love each other. We are also each others first SOs (maybe I'm young and naive). 

I don't know how to react other than feel sad and apologize when she guilts me for the things I've done. I'm really not sure what to do. I am confident we'll move past it but it's very hard sometimes. Any advice?

Can you give me the gist of the text in a nutshell?
<bot>: I was bad to my girlfriend before we started dating and she always guilts me about it and I don't know what to do