I'm not talking about jealously so consuming you want to cut up their clothes, key their car and boil their rabbit kinda thing. I'm talking about being a little bit envious. Feeling a little upset that they're having all the good things happen to them in life. It's totally normal to feel like this when you see someone doing well. Totally normal to want what they have.
Because what pushes us in life if it's not wanting to better ourselves? If it's not wanting what other people have? There's nothing like a good bit of healthy competition to give you the kick up the butt to achieve what you're capable of. How would we achieve our dreams if something isn't pushing us? It's human nature to think the grass is greener on the other side. But it's up to you to see if it's true by putting the hard graft in.
I'm going to hold my hands up and say I often get a bit down in the dumps that certain bloggers have all the best campaigns to work, get taken to exotic places, get to do their hobby as their blog and get dressed head to toe in ASOS for free. It's completely normal to think 'why them and not me'. The reason it's not me is because they have worked 10 times harder than me on their blog. They have lots of time to dedicate to their little space on the internet. I can have that too if I really want it - I just need to pull my socks up and push myself to be bigger and better.
Next time you feel green with envy, don't feel like an awful person. You're not. Simply use it fuel yourself to achieve bigger and better things. After all, you're capable of having what they have. Anyone is capable of anything. People who have achieved your dream have just put in the hours to make that dream their reality.