Yea u can, and there is no such thing as " putted "

also, adverb, strictly "also" should be put in the middle of the sentence, usually be between subject and predicate. e.g. I also like you. "too" is easy to confuse with "also", you can put "too" in the middle of the sentence or at the end of the sentence. you can say: I too like you or I like you too. most of time, you can see more that "too" is put at the end of the sentence.

i also have to go to the gym / i have to go to the gym too - usually you would use 'too' instead of 'also' if you wanted to put it at the end of the sentence

Yes, it can be placed at the end of the sentence also. ;) But not often. Ivy's advice is good.

In your example, I believe it is possible... although I heard "I love you too" a lot times in contemporary english, "I love you also" would define same meaning and effect as well. If I may use the adverb "also" in your sentence, mine would go like this: "I also love you" - more popular and used. :)