Can you cross into another dimension

My partner committed suicide 2 weeks ago. I have managed to visit him when I'm sleeping (dreaming) and when I see him everything is normal until I have to wake up and we are both saying how much we are going to miss each other because we know when I wake up he won't be there anymore. This isn't every night I have lucid dreams about a lot of places. I would really love to see him more and possibly just cross over if I can to be with him all the time.