I never got burned by asking for a raise. So do it. However, I recommend you read the details of how to do it properly, I wrote about it here: https://medium.com/@colunchers/how-to-negotiate-a-raise-9166...

The key is to honestly measure your market worth, and not threaten at all to quit. If you can convince your boss that other companies would like to pay you more, but you prefer your current company (which is what you say), then it's a solid approach.