I don't think it's you. Honestly, I think it's just our generation as a whole, because 'dating' and relationships are a lot more casual than they used to be. Takes all the romance out of everything. =P I feel you though. I've never been asked out on an 'official' date either. I've had 'things' with a few guys, and a serious boyfriend, but no dates. Not even like, implied dates. I'm always left wondering, haha. It's never like, "Do you want to go ____ with me on __ day? Meet you there at ___. Pick you up at ___," etc. It's always "What are you doing tomorrow? Do you want to hang out?" But I say that to my friends, so it doesn't feel 'official' if that makes sense. It's too sloppy and vague. I'm sure you know what I mean, haha. I like the idea that someone has planned something for me, just because they like me. Especially if they're normally a very spontaneous person, because planning isn't normal for them, so it shows that they really like you and want to do something nice for you even though it's out of character to plan it out. But it hasn't happened yet.
A date being two people who like each other, hanging out doing whatever at an agreed-upon time, by themselves. Unless it's a double date. Just hanging out with someone you like is different in that you'd feel bad ditching a mutual friend you run into. Whereas on a date, you're on a date, and it's about the two of you, so you wouldn't invite the friend to hang out with you, haha.