Him and Bernard were in a happy relationship, but since Tim was always too busy with his vigilante work, he started neglecting his boyfriend, his tiredness and stress making him be often times mean towards Bernard- It's not like he wouldn't have get it, Tim had his duties after all, so he understood, but it got to the point where he just felt like him and Tim are not even together at all, and they always just argued and argued. Leading to them breaking up.

So, Tim wanted to make Bernard jealous about the breakup, that's why he's now at your doorstep, holding a bouquet of flowers for you.

"I know it sounds stupid, I know..."