Open the doors, embrace the feeling and ignore it in the face.
We can't be certain what the future will be, that's more of a reason to do what you want. Because once the time passes and the opportunity is gone, you'd wish that you had the motivation to achieve what you wanted the most, rather than what you have.
Don't give up. Fight. Fight. Fight!
While cheering you dismiss the depressive feelings they have covering them up. Help them confront their fiercest challenges. That's the how you can actually make them happy.
Either you adapt to the thing or design the thing to adapt to you. That is where true innovation counts.
You get your hands dirty to see the real world.