Mk4 won't start and the battery & starter are still good.

I have manual mk4 Jetta with a 1.8t motor and it won't start. It tries and you can hear it trying to crank but it won't turn over. The electrical system is fine the battery is new and I had it boosted just to be sure. Starter works as well and can hear and see on the dash all the electrical systems are working. I think it might be the fuel delivery system like the pump or filter but I want to hear from other vw owners before I jump to any conclusions. If I've forgotten any info please ask for it I'll gladly give you any info on it. Thank you for any and all help.

Edit: thank you everyone it was the relay! A serious Thank you to all of you here and in r/Volkswagen for the help and a major thank you to all of you here!

Edit 2: Relay was shot but car still won't start. Fuses are good & I can hear the fuel pump could it still be broken?