Responding while being flirty can add some lightheartedness to the conversation, but it's essential to consider the context and your feelings about the situation. If you feel comfortable maintaining a playful tone despite the serious subject matter, here are some flirty responses you could consider:
"Oh really? I guess I'll have to be the expert brick remover then ?."
"Challenge accepted! I'll find a way to break down that brick wall of yours."
"A 'brick wall,' you say? Well, I'll just have to unleash my irresistible charm to tear it down."
"Hmm, let's see if I can find the magic words to make that brick wall crumble."
"I'll bring my sledgehammer and demolish any obstacles in our way!"
"Good thing I'm a skilled architect. I'll build something that'll leave no room for brick walls."
Remember to be mindful of the underlying issue at hand. If his statement about being "bricked up" is related to emotional barriers or other concerns in the relationship, it's essential to have a more serious and open conversation about your feelings and needs. Flirting can be fun, but make sure to address any significant issues in the relationship when the time is right.