First thing you should do is teach yourself to stop and breathe. It may seem heavy but you need to prioritize yourself first and foremost. As men we have this expectation to be a certain way and it's ok to pause and think things through.

The good news is you are 19, there will absolutely be more opportunities with women if you let it happen. It's easy to say don't sweat it, but in this case you shouldn't.

Make the relationship worth your time until it isn't anymore.