Senior dating a sophomore (college)?

Hello. I'm a senior in college and the other night I met this girl who is a sophomore. We were at an all-night fundraiser together and we were both too busy to really get a chance to sit down and talk but she made sure to say hello to me every time she saw me (like 15 times this happened haha). I'm contemplating whether or not to ask her out to lunch or whatnot. So my question is: do you think it is alright for a college senior to ask out a college sophomore? I know 2-3 years apart isn't a big deal when you're out of college, but when in you're in college I'm not so sure. I'm not fully committed either way and I like to get other people's opinions on this kind of stuff b/c I'm not so great starting relationships =P

Any help or opinions would be greatly appreciated. I'm totally opinion to all opinions. I hope everyone is enjoying their weekend! Thanks so much for the help, I really do appreciate it!