Sentences in English

I'm reading a book and when I find a word I don't know I create a sentence. Please correct my mistakes.
1) This guy is sweet and pretty reliable, you can trust him. (the word is reliable)
2) She was intent on winning this dancing competition and receive two thousand dollars as a gift. (the word is intent).
3) Mary is so exhausted (tired), she hasn't eaten since yesterday. She barely can stand on her legs. (the word is barely)
4) When Frank was a freshman he liked hanging out with his friends and drinking a lot. (the word is freshman)
5) Girls like guys with long tousled hair. Never make your hair smooth! (the word is tousled)
6) That guy is cocky, and Jasmin should hate him. But she already fell in love with him. (the word is cocky)
7) My friend was a sweet man, but he became so cruel after his girlfriend broke up with him. He started to argue with his friends and one time he hit me. I don't understand his cruelty. (the word is cruelty)
8) He likes me like a sister, and his attitude is always welcome (sweet). (the word is attitude)
9) She was walking home when the criminal grabbed her. Nobody can find her. (the word is grab)
10) Strong passion ignites within her when she is dancing with him. (the word is ignite)