This is true, and i guess most likely with you, Allen?
I did the same with my missus, reeeeeeeeeeeeally liked her and wanted everything to be perfect, and then it was all a bit shit. Told her, she seemed to like that she meant so much to me, we laughed it off and all's been good ever since! As you said in the previous, you're not used to anything consistent so that's probably adding to what you're feeling because it's not a regular thing for you to have. Anyway, im gonna stop telling you what you already know now...
In the immortal words of Tomturd; Relax.