I need help regressing

I need some advice. I've been a little for a long time but the past two years I haven't been able to regress like I used to. I think it might be a trauma response to hide it since my ex girlfriend had used it to insult me and it hurt A LOT. Sometimes, I feel the same need or want for it, but it just never really comes through. Is something wrong with me or what? I don't know. But I'd like to get back to where I was. Any advice?