Fwelin
"@Background Pony #AF79":/1602752#comment_6734652
She knew that he was minorly jealous about having someone to share Twilight's attention with, but that's normal, and does not normally require more than she did do to reassure him. She reassured him that Owlowiscious was only there to support Spike in a junior role, and then later told Spike that he was still useful even with the new addition.
The problem was that Twilight didn't know that Spike based much of his self-worth on being useful as Twilight's assistant, that he got a mistaken idea that Owlowiscious was doing everything, and that he thought she didn't love him any more when she was no longer solely relying on his help. That was not indicated in any of his actions or words towards her until he ran away, and there was no way she could have guessed that on her own.
She knew that he was minorly jealous about having someone to share Twilight's attention with, but that's normal, and does not normally require more than she did do to reassure him. She reassured him that Owlowiscious was only there to support Spike in a junior role, and then later told Spike that he was still useful even with the new addition.
The problem was that Twilight didn't know that Spike based much of his self-worth on being useful as Twilight's assistant, that he got a mistaken idea that Owlowiscious was doing everything, and that he thought she didn't love him any more when she was no longer solely relying on his help. That was not indicated in any of his actions or words towards her until he ran away, and there was no way she could have guessed that on her own.