Diet pills again ?

Most of you may have noticed that I gained weight after the Holidays. Yeah, i gained a few pounds and now, i dont think i am losing any of it because I am still enjoying all the foods here. I wonder if i can eat and just eat then still stay slim , huh?! If things won't change by February, then I will definitely try the diet pills that my friend is currently using now. Well, she said that it is effective in her system, so I hope it would do me good too, and hopefully no side effects at all. Aside from diet pills, maybe i should do some exercise too, what do you think?