Look man, it will only be a problem if
1) You start whispering to your cards "I love you"
2) You take them for walks on the park and try to make them eat ice cream.
3) You take them in the shower with you and try to bathe each one of them.
4) You start nameming them one by one like the diamonds and hearts "Jessica, Jennifer, Karla, etc" and the spades and clubs "Lakisha, Latifa, Shanika, etc".
If none of this happens then you're fine.
Just give your cards to your parents (all of them!), and tell them to give them back in a month. That should help you stop.