You could maybe brute-force your password using a script similar to what is described
here, however this depends on a few things.
How much of the password do you remember? Do you remember the type of character set the remaining characters belong to (E.G a-z, A-Z, 0-9)? If the password was a readable word/phrase, do you have any idea how the rest of it might go?
The answers to these questions may determine whether or not it would be sensible to try and brute-force it. Even if you know a lot about the rest of the password, it can still take days to crack it fully. If you don't remember anything about the rest of your password, it may not be worth the time or effort to crack it for the amount of Bitcoin you would lose.
