I am very much doubting your ability to summon demons with no baseline knowledge of the craft.
Spells cast by beginners often have no result because they do not know the baseline information neeed to get a magickal result.
May I ask what kind of spells you are reading? Where are they from? etc...
It may simply be that there is no problem, especially if what you are casting is fake.
Your friend is also probably just as much "born with magic" as the rest of us, no one is a hereditary witch even if their parents practice, it is something that anyone can do if they want to learn. It may simply be that you are getting the opposite of what you put out, especially if you are new there is a chance of backlash with spells cast incorrectly, your friend may have nothing to do with the bad luck, it may simply be your spells.