Asklemmy

So I met this girl by chance and we really hit it off, once I learned of her age I decided to just be friends as I think that 19 to 25 is an age were we mature a lot and I remember myself as a 19yo and I was not mature enough to be a good partner and to be good to myself.

I talked to a female friend of mine and she said that I'm over thinking it and that I should ask her out and be open minded, and so I did and we are going on a date soon.

The thing is, she seems really mature but I can't put aside the age gap.

Am I over thinking it? Should I really just take it slow and just be vigilant about the situation and notice if this isn't healthy for me or her?

Or should I let her down easy and continue as friends?

Update: We went on a date and it was great, I read all of the comments and there were some really good advices that I took to heart. I will take things slow and try to be as aware of the situation as possible. I hope it will go well :)

Thank you everyone!