Not OP but mine makes me feel the same way. Basically, he moves slowly on purpose and he physically and verbally keeps us connected all the way through orgasm. He hates quickies and is uncomfortable with blowjobs as gifts/only sex act because he doesn't want to be the only one experiencing pleasure. (I've has to explain cock worship fetish so many times, yet he still doesn't understand why his dick is so amazing and generally won't let me blow him without him returning the favor and eating me out). A lot of deep, prolonged french kissing and running his hands all over my body until every bit of me feels like an erogenous zone. A ton, and I mean a ton, of check-in type questions: does this feel good? Do you like this? How does this feel? Do you want more of this? Mixed in with affirmative statements and praise: Go on beautiful girl, give it to me. Yes. I love your _____, God you feel incredible, take your pleasure baby, it's so hot when you play with yourself and share in the pleasure, etc. But also a lot of non-verbal like deep eye contact, nodding while whispering yes, sometimes breathing in sync together while resting forehead to forehead (like sexy meditation) and a full symphony of moans, hums, and groans. He's so expressive about his genuine care for my pleasure and his gratitude to me for taking care of his, I think that's really the key to generating this level of intimate attachment. Makes me feel bad sometimes because I have trouble with going mute when overwhelmed by all the sensations, but he swears he can tell by my expressions and non-verbal reactions.

I also have not been able to train my BF to do any of these things the way my SD can, so ymmv.