Hi Siebe,
We are born into this world due to causes and conditions. When the conditions are available for us to perpetuate suffering, we will continue to suffer. When the conditions for us to enter Parinibbana are met, we will cease to exist anywhere in the 31 realms. Thinking there is a being to be had is just understanding existence in conventional truth. You can pose rhetorical questions to yourself like “Who am I?”, “Who is studying Dhamma?”, “Who is feeling the pain and joy?”…The only perfect answer to these questions is given by the Buddha, where He said we are born of our own kamma, bearer of our own kamma, creator of our own kamma, heir of our own kamma. Buddha’s message already told us we exist as a result of our own kamma. I believe the Buddha did not want to affirm existence or non-existence because it will only make our minds more confused and vexed.