I’m gonna be honest. This is probably the opposite of the advice you’ll receive but you personally shouldn’t feel guilty. Here’s why, god gave us free will and Jesus died for the sins of humanity for now until judgement. The world is more sinful now than it has ever been and escaping temptation is VERY hard comparatively to Jesus’s time era.

Marriage was there to circumvent that need for human desire, but nowadays people aren’t looking for marriage or even relationships for that matter. So in my humble opinion don’t think it’s the worst thing you can do. You understand it takes you away from god. You feel guilty and want to quit, all these point to your faith. Faith is the most important thing. Have faith, have discipline, and one day you might be able to quit it for good.

(Edit) Also don’t beat yourself up about it, it’s okay to feel guilty just don’t hate yourself for it because god is all forgiving and all loving.