Aphids are the worst!! They massively infested my cucumbers to the point of no return. I planted some Marigold flowers around my veggies as companion plants to prevent nasty bugs from getting on the rest of my crop. Thankfully that seemed to do the trick, despite losing the cues.

You could spray your squash plant with a light solution of water with a drop of washing up liquid, that kills off aphids. Just make sure you don't spray when sunlight is directly beaming on the plant as it can hurt it. Ladybugs could help too! Gardening sure is fun indeed. I have not been doing it long so I am constantly learning :)