Found Wife's Journal

I'm a 38M and been married to my wife 38F for 14 years. We have two young kids. I inadvertently came across her journal and read some. It was a notebook in the center console of her car, and I was looking for some sunglasses. In the journal she writes about missing the sex she had before we were married. And I get that, our sex life is nearly non-existent. I can handle that. But more troubling is she writes about a co-worker and praises him because he listens to her and she says their personalities are very compatible. She mentions his looks and seems to imagine a way to be with him. I don't have evidence of actual cheating. I know emotional cheating is a thing too. My heart is ripped out. But it IS a journal, and I know some people write things in a journal to process, without any intention of actually doing things. So should I confront her about this? Or just take this as a wake up call to try to be a better husband. Try to listen more and be more present, and give it some time? I'm so hurt that I'm physically ill, and have no idea how to handle this. I would appreciate any advice on this. Thanks

UPDATE: So I confronted her about the journal. And several have said how I invaded her privacy and broke trust by reading it. That's fair. I wasn't snooping around for it, but I came across it and did look at it.

She was understandably angry, and said the journal entries were her way of coping with our issues. I have not been there for her emotionally, and she found someone at work that she can confide in. She swears she never cheated and the guy had no idea she had thoughts like that. But no one writes those things if they don't have feelings for the person, journal or not. She feels like she does all the childcare and it's not a partnership.

She says she still loves me but things can't continue like this. She said she is open to couples therapy, but she wants to try a SEPARATION and date. I feel like a separation is just the beginning of the end. I'm committeed to quit out alcohol completely (that was an issue I have that I left out of the initial post), doing therapy, helping more with the kids, etc.. But if she is suggesting a separation, I feel like no one comes back from that.

UPDATE 2: First off, thank you all for your replies. I haven't had a chance to respond to a lot, but it has helped process this. In a text she mentioned the separation and date part, but once we talked she said she was talking about US dating, not dating other people. Anyway, separation is off the table. She said she is willing to throw everything at this marriage to make it work but I have to be serious about it. And I am. Scheduling an appointment with my doctor today to discuss my drinking problem and a course of action. Also calling to setup couples therapy for both of us. At this point, I need to be the best version of myself if this thing has any chance. And I need to be that regardless of what happens to the marriage. So I'm going to do my best to push the journal out of my mind (tough!) and focus on improving myself, and being the best husband and father I can. And it may not work, I get that. But I want it to, and I'm going to give it my best shot.