<human>: I want to keep this as short as possible. I've been in a relationship for 2 years now and live with him. Some months things are so great and I'm extremely happy with where I'm at in life. I think marriage could be on the table somewhere down the road. Then I go through periods where I think things could never possibly work out with us in the long run. I'm not sure if this is a sudden moment of clarity and I need to just be single for a bit longer or if it's me going temporarily insane. 
     
Has anyone else ever been through this?  Is what I'm feeling some sort of hint to move it along/go with my gut kind of deal or just typical relationship stuff?

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: Me 26F him 25M parts of our relationship are perfect and sometimes I feel that we could never be. Is this normal?