I and my partner are working at a startup idea for about half a year and we are hoping to push out beta product in next month. Since I am in school right now, I am the one who is not working on this idea full time. Because of that, winter break and summer break is crucial for me to keep the progress up. However, I got an internship offer from IT company X (a well-known one) for summer break about 3 months. It is my first internship in a well-known company and I really take serious about this because it is a kind of proof to my family that I can get an offer from industry if I want, so that they can support me for the startup (I expect to graduate and work on this full time in next year). How should I tell my co-founder about this? It is certainly not the thing he expected.
Ask HN: how to tell my co-founder that I gonna leave for about 3 months?