Normally, girls dump boys. After years of courtship and constant dating, it is vested to know and foreseen scenes of breaking up. Reason would vary from third party to i-just-don't-feel-the-chemistry-anymore excuses. But when obsession speaks and jealousy is present all the time, it is taking through the nerves of men.

Nobody wants to be dumped. Nobody wants to dump a lover either. But when reality speaks, it is really hard to conquer the heartache and bitterness. I guess, we should at least understand why.

He feels suffocated. 

learn how to read his mind. even though you "seem to know everything" about your guy, be sensitive and learn to read his mind. sometimes men need time for themselves alone. let them feel their freedom and you are not exaggerating your tender love and care for him.

He thinks you're too demanding.  

you think because you are his woman you can rule his life for him. Come on ladies, we should not let them rule, and eat you. Give him a little space and make him you care for his happiness too.

He thinks you're too jealous. 

less jealous

He's not really for a relationship yet. 

enjoy it while it last, then move on

He still want to keep his option open. 

he's not yet ready to be that committed

He doesn't feel the chemistry anymore. 

there's no other thing for you to do but to let go.