Correct the mistake in sentence. 1. I want to be a friend of him because he is funny. 2. I going to Mexico to visit Manuela, a friend. 3. We are meeting at the park at two o'clock because before that I will go the dentist's.

1. I want to be his friend because he is funny.

It's incorrect to say "the friend of him". You can say "his friend".

2. I am going to Mexico to visit my friend Manuela.

3. We are meeting in the park at two o'clock because I am going to the dentist's before the meeting.