Sir.
Those movies and tales of 30 - 60 mins are rare and mostly on drugs. Average guys do less by far.
To the solutions:
(This language of wazua isn't for everyone...so i speak my mind my language

)
Concentrate on pleasing your partner rather than yourself. This will take attention away from you and to your partner. It will also lead to more trust. take your time and please her during foreplay (15 - 20 mins).
Don't change partners. Stick to one so you may develop more trust and thus gain the much needed confidence. (Its ok to get married at this time.)
Try switching positions and varying the speed and pattern of your thrusts, you might attain more time. (Some more seconds gained is cool. It takes practice

)
Get out when it becomes too hot (PG). Take some time to cool off and use the "free" time to tease....(She might think you are very experienced and can hold off at such a time - can someone confirm this here?)
Press the head when you are about to burst...this will slow it down. (Might fail at time - but keep trying)
Trust me and most here would agree to this. The first one doesn't always last long. Concentrate more on the second term then it will get down to the first.
If the first one is too short (Embarrassingly quick)..try to take matters in your hands before getting to the main duty. (call it professional skip of the first term)
Lastly if she has ever told you how horrible you are, delete her contacts and get someone who will sing your praises (for the ego) or shut up.
Kumalizia, at professional level, practice yoga and meditation which will take you to an hour or two.
Wishing you(And other fellows who weren't as brave) well.
p/s I used to read a lot of these when I was in books. I was a very shy guy and would not imagine disappointing the one I always thought of.
Ignore the fellows telling you to pray and fast (Ok its good to pray). You need to eat well and be healthy.
Adapted from "Adevetures Of Akuku Danger" (pun intended)
Keep it simple