One of the best things I have ever done (and do) for myself is save memories of people being loving to me or showing that they know/understand me.
I call this my "love memory bank" and at first I was writing stuff down but then I kept forgetting, so now it is pretty much a collection of screenshots from snapchat or texts or fb, whenever someone says something that makes me feel loved or understood.
Whenever I try to think of someone being loving to me, I can't remember almost anything, because my memory is the worst and anxiety makes the good stuff the hardest to access. But when I look through my love memory bank I am amazed at how sweet people are to me, and it is "proof" of being valued which is something my anxious brain needs.
Bonus: I can make myself feel loved anytime without anyone else having to do ANY work for it!