My friend got me a ticket , her name is on the ticket and not mine Would I have a problem using it. ?

They just scan them at gate, and dont look at the name

No. They do not check that closely. They will have to honor the ticket regardless. People purchase as give aways and business.

I dont think they will look, they usually just scan the the ticket for you and you do can either go buy stuff and/or go and find your seat.

You shouldn't have any problem.