Actually your attitude matters. The way you look towards objects is important, positively or negatively. The same stone seems to be a hurdle on the road blocking the way. Suddenly some artist comes there and give the stone shape of some diety. Then it is established by people in a temple near by. Now you bow before the same stone and start worshipping it. Now what happened ? What changed ? Nothing only some extra part of the stone is removed from there to give it the shape of an idol. Now your attitude has become positive. Your vision is transformed. Your perception is changed completely. 
The same way, fruits and sweets become Prasad after offering to your daily. Earlier they were only fruits and sweets on the shop but after offering, they have changed into Prasad. What changed? They did not undergo any process of physical transformation but your point of view of looking at those objects is changed from normal to special. This is positivity. 
The same thing applies to life also. When you look at the life as full of problems, then everything becomes sorrow for you. Every situation becomes irritating for you, which worsens your condition more and more. It gives you sadness, makes you more and more dull, lessens your strength not only physically but also mentally. Decreases your level of confidence. But when you look at it as a solution of different things, then life becomes a joy for you. Everything becomes a source of happiness for you. Every situation becomes an opportunity for betterment. Every small incident seems to be a chance for you to prove yourself. It gives you excitement. Makes you more and more enthusiastic. Increases your strength not only physically but also mentally. Increases your level of confidence. 
When two fast friends suddenly begin to fight with each other. Start doubting on each other. Begin to believe others than believing their fast friend. This all occures due to some misunderstanding only.  Months and months later, suddenly one day they meet their old teacher. He listens to them separately with patience. Then remove their all confusions. Now they are again fast friends. Somebody had come in between and misguided them towards each other. Now what happened? What changed? Nothing, only their attitude towards each other has become positive again. Now they have learnt the art of Let go to trivial things. So nobody can misguide them in future. This positivity is only needed in everyone's life to make it happier. 
No life is not that complicated. But actually it happens that most of the time, our mind is conditioned to seek a complex solution to the problem. Our mind gets conditioned so much by the circumstances that we cannot see the obvious. When we go to a specialist doctor with a simple headache then diagnosis starts from a migraine upwards. We assume that things are complicated. And we get entrapped    in the ghost of its thoughts. We carry on the same syndrome in our relationships also and make them complicated for no reason. So be simple in life. The more you are simple, the more you are happier.