I vs Me

If you are the subject of the sentence use I.

• After I drank my coffee, I was very happy.
• I asked Arriana to help with the project.
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If you are not the subject (just the object of the action), use me.

• My mother told me to focus on my studies.
• The ball came flying through the air and hit me on the head.
• The weather looks very cold to me.

In sentences like those above, we don't tend to make mistakes. Our mistakes tend to happen when we group Me or I with a noun

• The referee was looking at Jack and . . . (me, I)

To determine if the usage of "I" is correct, all you have to do is take out "Jack" to isolate the first-person pronoun:

• The officer was looking at me.

The referee was looking at Jack and me

• 
  

• Neco and . . . (me,I)  are excited to go to the concert.

I am excited to go to the concert

Neco and I are excited to go to the concert.