* J'aime aller à la bibliothèque. (Most direct and common translation)
* J'aime bien aller à la bibliothèque. (Slightly less strong than "j'aime," but still conveys liking)
* J'adore aller à la bibliothèque. (Stronger than "j'aime," expressing a lot of enthusiasm)
* J'apprécie d'aller à la bibliothèque. (More formal, emphasizing enjoyment)
You can also express it with a verb of motion:
* Je vais souvent à la bibliothèque. (I go to the library often)
The best option depends on the context and your desired level of formality.