Out of all of Raj's relationships on The Big Bang Theory, his time with Emily Sweeney was the most promising. Sure, we did find Raj engaged to Anu by the 12th season but that relationship was founded by Raj's parents. It didn't start off in the authentic way that Raj was looking for (which is why that relationship didn't last either).

Related: The Big Bang Theory: 10 Funniest Raj Quotes About Love

The Raj and Emily saga lasted for four seasons (Raj's longest relationship on the show) and showed us all the ups and downs Raj can bring to a relationship. These two were obviously drawn towards each other but was it out of attraction or comfortability? After all, Emily thought Raj was a mama's boy and Raj thought Emily was creepy. Was fear the only thing driving behind this relationship? Let's take a look at 10 reasons why Raj and Emily were toxic together.