I'd make sure she got the call. Could be something wrong with her phones or other "good" excuse why she didn't call you back. When did you call; if it was like last night and you're seeing her today and she wasn't able to call you last night, I would imagine since she's seeing you today she wouldn't call. But if it was last week or something, then I'd "assume" she didn't get the message and would check that first. If she got the message she's going to go into details why she didn't call back but if she didn't get the message. . . it doesn't really count; then you can just mildly say you were disappointed because you asked her to call you back. It's okay to be disappointed! Everyone is. It doesn't have anything to do with whether she's a T or how "old" you are, etc. You are allowed to want what you want and to be disappointed if you don't get it.