Mate,. .Gofaster got it in one, flying Fighters is the worlds greatest job and all you have to do is want it. Close your ears to all the 'stories' you hear about why people failed trying to get there. Most of them are bulls&*t, most of them are people trying to make up excuses as to why they didn't want it enough. LIF, IFC and OCU is only hard if you don't want to do the job, if you want it, you will kick butt at it.
All the best, don't let the weak cloud your mind.
D