I am 14 and my crush is 17. Is that inappropriate?

In your teens, an age difference like that is a gray area - some people will say it's fine, while others will say it's not. However, regardless of the opinions you hear, there are large developmental differences between 14 and 17 (which would put you at a higher risk of being taken advantage of), and potential legal concerns if you two engage in sexual activities. If you do decide to pursue a relationship with this person, make sure that you set boundaries and stick to them, keep connected with people outside of the relationship, and don't be afraid to tell someone you trust if you think the relationship is unhealthy.