Is 16 and 19 ok?

Is it wrong for a 19 year old to date a 17 year old?

Not at all. The age difference is minimal so that's not an issue. But you might want to take a look at this. The only thing to remember is that IF the age of consent is 18 you have to check if there's a close in age exemption in the law if sex is on the agenda.

What is an acceptable age gap for 19?

For those who'd like to put a number to things, usually, a gap of 1-7 years can be considered an acceptable age difference between adults. People whose ages are within 1-3 years typically do not see much of an age difference, while years 4-7 might begin to feel a little bit more pronounced.

Is there a difference between 17 and 19?

The real rules about how old and young you can date. The “creepiness rule” states that the youngest you should date is “half your age plus seven.” The less commonly used corollary is that the oldest you should date is “subtract seven from your age and double it.”