My dog is cuddling me for the first time

I've had her for 3 years since she was 3 months old. She's never been a cuddler—she's very affectionate but she loves her personal space, especially when she’s sleeping. This is the first time she's "cuddled" like this since the day I got her from the shelter and she was so nervous she wouldn't let me put her down. It makes me so happy to know she finds comfort in me :)