MySQL: Big amount of tables

[Borut Svara]

Hi,
Let me say that i'm new on this forum so apologize for any error.

I try to explain my worries;
I have two tables:
-'users' within a lot of columns (uniqueID, name, surname, username, password, ...).
-'comments' which contain a list of comments writed by users on various topics.

Now... i'm planing to expand the table 'user' to 100'000 rows and the 'comments' to 10'000'000 or more.

Here is my problem: i want implement 'likes'. Each user could 'like' 0, 1 or all the comments, and each user can se the list of 'liked' comments. But i don't know how to do. There is no sense adding columns to 'user' with a bolean value like/nolike for each comment or adding columns to 'comments' for each user, because i will use a big amount of memory for saving this data, but how much is possible that everyone likes all comments? or even the 10%? there will be a lot of space with 'false' value.

So i used a bit of fantasy and I asked my self; if i make a table named {'LK' + user uniqueID} for each user, with a single column which contain the ilst of comments uniqueID liked by the user?

Thinking about this i get a lot of worries, because i don't see any problem doing this, but i never sow this type of SQL server hierarchy and it seems strange.

I just need a mySQL guru which says me 'you are on the right way' or 'you are crazy, and you are making it wrong'?

Thanks