"I think I really like it."
Here are some other options, depending on the context:
* "I think I really like it a lot." (emphasizes the intensity of your liking)
* "I think I'm really into it." (implies a strong interest or enthusiasm)
* "I believe I have a strong liking for it." (more formal and literary)
* "I'm pretty sure I like it a lot." (shows a bit more uncertainty)
The best translation will depend on the specific situation and the level of formality you want to convey.