Ahhh. Yeah that's a different issue then. Something that might make you feel less guilty is telling yourself that you'll eventually invite them out to something to make up for you skipping out. If they don't want to come that's fine but at the same time you're reaching out so they know it's not because you don't want to hang out with them. Usually I make my friends cookies if I'm too busy to hang out haha. But yeah, feeling guilted into going can really ruin fun experiences.