I just wanna vent

I pranked her earlier trying to say that I couldn’t be with her anymore but now that I’m sitting here thinking I don’t know if I should be. This relationship just puts a lot on me. It shouldn’t be like this and I know I vent on here all the time about this and nothing changes but its so hard to walk away from someone you love and care about so much. Someone you only see your future with but she doesn’t know how I feel when it comes to a lot of stuff and I know she can’t read my mind but when I try to say something she just claims “it’s not true” or that I’m being over dramatic or doubting us. I’m more sad or upset than happy. I keep too much to myself and it’s not healthy but I feel like I can’t talk to her about certain things because I’m overly sensitive or etc. I wish she would be affectionate how she use to be. I wish she would understand how she use to, I wish we could be happy like how we use to be. I wish we could go back to how it was and I wish she wouldn’t put so much pressure on me to do certain things instead of trying to make me feel comfortable and to be patient, I’m insecure when it comes to a lot of things but I feel like she doesn’t believe me when I tell her this or when I tell her a lot things. & I know a lot of this is my fault as to why she’s like that with me but it’s been months and feels like things aren’t gonna change so what’s the point of staying in this relationship if things aren’t gonna change. Dont get me wrong when things are good with us I’m happier than I ever could be but when things are bad and we fight it’s so hard on my mental health and idk how much longer I can keep doing this. I don’t know how to tell her how I feel about all of this because I’m worried she will take it the wrong way and we will fight or it will cause us to break up. But I just needed to get this off my chest because this is the only way I actually vent instead of keeping it to myself.