Asia, I have been seeing my T almost as long as you. I am going through something similar...feeling like, "Is T for real?"
I have posted this before, sorry - I sensed the relationship deepening when we spoke a few minutes before her recent vacation and she said to me, "I will think of you while I am gone and I will hold you in my heart." I head her...at first thinking, "What?" But, Omg, that one got through my armor.
How did I deal with it? Unusual for me, I believed her.