Hahahahahaha, I love the line you used there;
...such a genuine heart should not be given to such an immature person he's claimed to be.
That perfectly sums it up. Relationships are not for babies. Age is never a true reflection of maturity and the guy has proved to be immature as you have rightly said. When a man cannot think on his own, he is not fit to take another person into his life.
Thanks a lot for this lovely contribution.