Dropping a subject

I do Maths, Physics, Chemistry, Biology and Further Maths A-Levels and I am finding 5 A-Levels wayyyyy too much. Should I drop Further Maths (my 5th subject). I just don't see where I will ever need it!

I also think that this way I could concentrate on my other four A-Levels more.

I want to drop it because I don't enjoy two out of the three modules for it so...

Saying this I really enjoy Further Pure maths and learning about complex numbers etc and there is only one lesson a fortnight for that, so do you think I could still go along to those lessons without the intention to do the exam just to do the learning because I really enjoy it?

Any advice or time management tips etc ould be really appreciated. Thanks.