Agreed.
A lot of people are like you, it is easy to get angry when you're being "ignored", but what you need to remember is sometimes people need down time, time to be alone or just hang out with their friends. You can't depend on people too much, or at all. He has his OWN life, you may be a part of it, but I doubt you're all of it, sorry.
There really is no advice to give, because these are your insecurities, you obviously get angry and jealous for a reason - and those reasons are probably about fear, acceptance and being insecure. I could be way off the mark, but I don't think so. You need to slow down and calm down.
To love is to suffer. To avoid suffering, one must not love; but then one suffers from not loving. Therefore, to love is to suffer, not to love is to suffer, to suffer is to suffer. To be happy is to love; to be happy then is to suffer, but suffering makes one unhappy; therefore to be unhappy one must love or love to suffer or suffer from too much happiness. I hope you're getting this down.