Who has a crush on Taiga?
During Taiga's ending on the PSP, she marries Ryuuji (which now makes her Taiga Takasu) and becomes pregnant with triplets, in which this ending is also how presumably it would've gone in the anime.
Taiga Aisaga is the main female character in the anime, manga, and light novel series Toradora; she's the love interest of Ryuugi Takasu, and the former potential love interest of Yusaku Kitamura.
Both Taiga and Ryuuji are heavily heartbroken, and Taiga even apologizes to Ryuuji because she feels responsible in the situation. She had been living alone because she had not gotten along with her own parents and had felt at home at his house.
Ryuuji decides to help Minori go after Taiga. While running to catch up, Minori shouts that she has always liked Ryuuji but held back because of her friendship with Taiga; she also says that Taiga has to obtain her own happiness as well. Afterwards, Minori confirms Ryuuji's love for Taiga.