So i suddenly find myself in love with a guy and i have not really felt this exact way about anyone like this, except perhaps my wife (it's ok we are in an open marriage for over two decades). We have seen each other like 15 times in 3 weeks, i am not even kidding

We have a lot of joint friends and share so much in common. I could brag on him more, but readers of this post might start sticking their fingers down their throats.
So anyways i obviously want to do my best at this and not overwhelm him. He told me that he " he wants to start seeing me outside of our friends gathering place". We usually end up being along after they all leave but actually going on dates sounds exciting and a bit scary. We are affectionate with one another, we hug, we kiss some, cuddle and i could literally stare into his baby blue eyes for an entire day straight. (see there i go again). We have not had sex yet and frankly I'm emotionally whirling and kind of love taking that slow.
He did say something that sort of concerns me. He basically said " the physical attraction he has for me is still new and not that strong yet ". The yet part i find interesting because he then said " but i am pretty sure that will develop because the emotional thing is there" I then reminded him i was only going to get more feminine as time goes on and he said he knew that. He said "lets go slow and see how all that develops." Our friends are already calling us a cute couple and taking selfies with us

He has never dated or been with a trans woman.
Questions: Have you ever heard someone say like " my physical attraction will develop for you"? because i can't really ever recall being in love without that initial strong physical attraction. He always says things like " you look really nice tonight" and as soon one of us walks in the room we beam smiles at one another. I believe part of him is sort of reeling from all of this too and from the social aspect of being with a trans woman, however he never acts embarrassed or anything and our first kiss was in public.
Also i know there are many threads that discuss HRT and its effect on sexuality but, I have always considered myself very bisexual but recently my estrogen was doubled and i am pretty uninterested in looking at women at all. Have any of you seen such a swing? This does present some challenge to my marriage, although we are friends and companions well over the physical part.
Anyways thanks for reading about my sappy love life

Would love any thoughts or similar experiences.