$\mathfrak{From\>}b\>\mathfrak{to\>}a,\mathfrak{and\>then\>}a\>\mathfrak{to\>}b,\mathfrak{come\>find\>me!}$ TWFyayB5b3VyIHNwb3QhIFdhbGsgZm9yd2FyZC4gCkFuZCBmb3J3YXJkLiBBbmQgZm9yd2FyZC4KQW5kIG5vdyB5b3UndmUgZm91bmQgeW91ciBzcG90IG9uIG1lLgpUcnkgYWdhaW4sIGdvaW5nIG92ZXIgdG8gbXkgb3RoZXIgc2lkZSwgYW5kIHdhbGsuCkhhdmUgeW91IGZvdW5kIHlvdXIgc3BvdD8gT2YgY291cnNlIHlvdSBoYXZlLgpXaGF0IGFtIEksIG5vdz8=
Even after this, can you find out what I am? For this is only the first step to infinity! But, after a while, you'll end up right where you started.
Hints:
The first line is the title of the post.
The title is a hint (in fact, is essential to solving the puzzle).
It has two parts, the first being decoded the seemingly random arrangement of text. The second part is a riddle.
The first part is programming-related
The little blurb after the puzzle will help.