Need advice on if I should stay

So me and my significant other have been together for almost 3 years now. During out relationship we have had good and bad times but have managed to figure things out and stay together. I would say for the past couple months I have felt that this relationship is not getting to where it should be but rather the opposite. Examples are we are fighting over just the most mundane things. An example is like don't talk about what other celebrities are good looking it makes her feel uncomfortable. But it's not like it's a 1 minute say it and leave it, it would drag on to a 15 minute argument about it and me trying to just stop talking about it just makes it worse and longer. It's tough for me because I really care for my partner, but being told that I should be with her whenever I have free time or talks about if we don't get married in the next 2 to 3 years will be a waste for her is just tough to deal with. I feel like I try my best to be with each other and keep in mind she doesn't drive and is about a 45 minute commute just to see her. She tries to put all the tiny problems into big issues. I love her family and even they at times agree with me how she acts so over the top on such small issues. We have had talks before and most recent one was about 2 months back where I just broke down and everything hit me. Was tired of all the fighting, the bs and I almost ended it but she convinced me that things would change and would get better. As lately somethings have gotten better the the majority of the problems are still persisting. I need help to figure out if staying in this relation ship is a good idea or just let it go. Also just to add we are both 25 so not in high school yet I feel as if we are based on the arguments we have.

She is not driving because in high school she was involved in a car accident and is terrified of the road. Yes she lives at home. To add, from what she has told me, she was in a abusive relationship. Both physically and mentally and as I understand that it must have been tough for her to go through that after all this time together I would hope that it wouldn't affect our relationship. I feel though at some times she doesn't trust me because of past relationships she has had. An example is I'm going away for a weekend with a bunch of guys and the first thing she says is don't cheat on me. Not a hope you have a good time just on to don't do something that will upset me remarks. Also I feel that at times like I was saying before that she wants to see herself married in two years. I don't know if that's the case and I've spoken to her and said that when we are both ready it will happen yet I feel as if I'm getting pushed into doing it on her time line.