So basically like the title says, my partner has always talked a little in their sleep which never bothered me but sometimes I get these bits of information. Now to preface we have been drifting apart recently and I have been trying to make an effort to spend more time together, have better and more open communication, listen to their problems and what not. About a month ago I noticed she stopped replying to "I love to you" and all her texts are one word answers. I have tried starting conversations that aren't serious just trying to engage and get some dialogue going and it's normally hit and miss. About a week ago she was mumbling in her sleep and said "I hate my husband". This really caused me to start spiraling as we have been together for a decade and have a child together. I didn't confront her about it directly because who knows what she was dreaming about but I did talk to her about maybe going to couples therapy or counseling of some kind and it only made her frustrated and upset so I backed off. Over this past weekend I suggested we go out and do something just, me and her to which she agreed. We got dressed up and took our child to a nanny and had an amazing time, it felt like we were kids again, at least until we woke up the next morning. We had obviously had a few too many drinks and ended up making a bit of a mess in the house before we had gone to bed. When she woke up she was yelling and crying like she was hurt that we slept together, I was super confused about the entire situation because I thought we had a fun night out. We had an argument but eventually we apologized and kind of moved past it. Last night as she was laying down she started mumbling like she does in her sleep and said "I hate my life" .
Honestly I don't know what to do, I feel like anything I try to suggest that may better our relationship gets rejected or makes her more frustrated with our relationship. I will admit I haven't been the best partner but I am trying to be better I'm just not sure what to do or how to get her to want to talk to me about what she is feeling since when I ask she denies or just shuts down.
How can I get her to feel safe talking to me or going to couples therapy so we can work out issues out?