Tristan Thompson‘s almost ready to celebrate his Dirty Thirty, and he already knows what he’s wishing for when he blows out the candles on his cake. The Boston Celtics player wants nothing more than to make up for good with his ex-girlfriend, Khloe Kardashian, and transform their friendly co-parenting relationship into romance again. It’s Tristan’s “main birthday goal,” a source tells HollywoodLife EXCLUSIVELY.