Ask HN: What to do if co-founders are distracted by other business ventures?

I'm the technical co-founder of a startup with two of my close friends. We've been in business for more than a year and are profitable. However, both of my co-founders are constantly getting involved with other business ventures while I put in alot of work into the startup. I feel they aren't as completely committed as I am and it's definitely hurting our growth. Lately it's been very demotivating for me knowing that while I work on our startup, they are researching/getting involved with other startup ideas. However, I don't want to completely abandon the startup cause it has a lot of potential and is still growing. But I can't continue like this since it makes me frustrated and stressed out.

Does anyone have experience with this type of situation? How do you guys recommend I approach this?