What would you do?

[Nevadaref]

Originally Posted by Whistles & Stripes

Don't take it personally.

Main Entry: per·son·al·ly
Pronunciation: 'p&rs-n&-lE, 'p&r-s&-n&-
Function: adverb
1 : in person [attend to the matter personally]
2 : as a person : in personality [personally attractive but not very trustworthy]
3 : for oneself : as far as oneself is concerned [personally, I don't want to go]
4 : in a personal manner [don't take this personally]

[WhistlesAndStripes]

Originally Posted by Nevadaref

Main Entry: per·son·al·ly
Pronunciation: 'p&rs-n&-lE, 'p&r-s&-n&-
Function: adverb
1 : in person [attend to the matter personally]
2 : as a person : in personality [personally attractive but not very trustworthy]
3 : for oneself : as far as oneself is concerned [personally, I don't want to go]
4 : in a personal manner [don't take this personally]

personal

adjective
1. concerning or affecting a particular person or his or her private life and personality; "a personal favor"; "for your personal use"; "personal papers"; "I have something personal to tell you"; "a personal God"; "he has his personal bank account and she has hers" [ant: impersonal]
2. particular to a given individual
3. of or arising from personality; "personal magnetism"
4. intimately concerning a person's body or physical being; "personal hygiene"
5. indicating grammatical person; "personal verb endings"

Looks like my usage was just fine.

[Nevadaref]

Originally Posted by Whistles & Stripes

adjective
...
Looks like my usage was just fine.

No, you used the word as an adverb. It explained how you did not want him to take your comment. Thus you needed an "ly" at the end. I even included the example sentence from the dictionary for you, which is nearly identical to what you wrote.

But don't believe me, we can wait for rainmaker to show up and tell you the same thing.