Okay so I'm 19 dating a guy 13 years older than me.

He's known me my whole life and he's great better than great.

We are talking about getting married and all
Do you think the age difference is going to play with my mind later in life :(

I know a woman who is 20 years younger than her husband and they're still married. Try not to think about those things. Remember, age is just a number. It can work out if you want it to and try.

19 is very young to be getting married. Especially to someone who has much more life experience than you. I've dated men ten years older than myself and there is a visible difference. Unfortunately with older men, we never quite gelled. I'm not saying don't date someone older, but do be aware that the age difference will come into play at some point in your life.

Thank you everyone.
But I need more advice please.

I think you at 19 are most likely mature and able to think for yourself.
13 years is not really that big of deal, more now than in 10 years.
If you are 40 and he is 53, no one will think a thing, if you are 50 and he is 63, not even a eye batted,
So if you are in love, go for it.