Hi YIL,
Being in love with both her and the Tantric path is fine, that’s the way it’s meant to be, ideally: Worshiping the world through a loved one; but don’t bother much about goals, the road is the goal. Just be there, be present, like a relaxed yet acting witness - and when 5 hours feel like 5 minutes, show her you enjoy every second anyway.
In meditation, we learn to stay relaxed and focused amid a stream of thoughts popping up, in love we learn to stay relaxed and focused amid a stream of thrills and sensations, cultivating a detachment amid of a passion: opening our heart for Shakti, loving deeply, yet not clinging, not attached to a goal, not demanding a reward. Remember Shakti is form while Siva (the male) is pure consciousness…
Also, “Love expertess” for a woman is quite a bit about relating to you, rather than expertise in general, so that may be a good start.
I agree love tends to “happen”, but I tend to help it along a little 
using Tantric techniques. 
A common belief in yoga is that love (or at least mutual strong attraction) at first sight happens because of a mutual love i some previous life - so, considering the fact that humans/primates have been around for millions of years, you might have met before.
I think if it all would turn out to be wrong, unexpectedly, my gut feeling will tell me then. But if I drop the chance to avoid the risk of pain, I’ll never know at all.
That’s great advice Hatha Teacher, thank you, it inspires.
Let’s see where this road leads us…
All the best!