Welcome to LTTD.
As for your question, ask yourself why do you think reincarnation is real?
Do you believe, or do you know--or do you WANT to believe?
There has been no real evidence to support the notion of an afterlife or reincarnation. Everything we have acquired from science tells us that this is all there is. It may be dissappointing to many, but it is better to know this early on so you do not get dissapointed when you reach your late years and realize that you have not lived the life you wanted.
So our lives are precious, we want to live it out as best as possible and not waste it.
In the end, contrary to popular belief, you will probably regret the things you didn't do in life, rather than the things you did.