Ladies, question? Howcome I get this overwhelming feeling when...?

Ok, well, I have a question for the ladies... When my fiance, Patrick, and I lay in bed every night, we like to cuddle. Sometimes, he'll go to bed after me, and I'll lay there, and feel him pull me up close to him after he lays down, and I'll snuggle into his side. Right then, it's just like the best feeling in the world. I love that exact moment where he puts his arm around me and I snuggle up to him. Is anyone else like that? But it's weird... whenever that happens, right as I snuggle into his side, I feel this... rush... of love for him, and I feel like I want to be closer to him, even though I already am snuggled right up against him. It's like I can't get close enough to him. I just feel like I love him so much that I want to be as close as I can... even though I am... It's just like this overwhelming feeling... Why does this happen? Does it happen to anyone else?