Pride comes before the fall

What was a time that your pride ruined your relationship? Check egos at the door please. I'm asking what you did wrong, not the other person.

I can't fully pin point what I did wrong but I'll list all things I believe I did wrong. 1. I was to needy and clingy. I always wanted to be around her. Not because I didn't trust her I just genuinely liked to be glued to her 27/7. 2. I was directly honest. Let me explain, one day she was talking to her sister in law and I was laying on the bed next to her in her room day dreaming. Then they started talking about "boobs" for whatever reason and then my ex turned around and asked me "hey my boobs don't sag do they?". I responded honestly or logically in biology terms. I said "yeah they do but that's how all boobs are. They are meant to hang and they are supposed to be that way". She then got mad at me for that day and seemed to change a little towards me. I wasn't trying to put her down at all I still liked her so damn much and to me she was still hot as hell. 3. She wanted to introduce me to her other friends which one was a guy and I didn't like that idea. I told her that I'm going to let the guy know that I'm with her, in a sarcastic tone though but I was still serious in a way. 4. I got mad at her sister when she was being a spoiled brat. 5. I never finished when she gave me a hand job or BJ. Since that one day when she tried she said "I'm not good enough". And that's the day she changed completely. It was my first time with a real female, I usually always did things myself. So I was use to my own hand not someone else's. After that though the relationship went down hill. I didn't know what was going on and I didn't know how to save it. I believe she felt like bad or hurt because of that scene. And my autism didn't help because I didn't know how to explain things back then like I do now. I didn't know how to explain my feelings as clearly as I do now in other words. Human emotions are so hard for me to understand and express. I don't know if this answers the "pride" thing but for all of the 5 things I said I felt as though I was right in my own head at that time so I think that counts as pride.