Does below sentence makes sense?
He bolsters me whenever I am in need of
Here, I can't find any of dictionary meaning of bolster may fit here. Is this word usable in this context??
Here it means: He supports me whenever I am in need of (something).
to add to, support, or uphold
They bolstered their morale by singing.
I don't think it's useable in that way. You can bolster - support or encourage - an attribute, not the person.
'He bolsters my [confidence/morale/mood etc]…'
A bolster is also a type of pillow, btw, a support for sleeping, cylindrical rather than flat & rectangular, which I would guess is the original meaning; secondary would be its use as a support for a person's mental state.
Longman DCE says in number 1: to bolster/to bolster up: to help someone to feel better and more positive. http://www.ldoceonline.com/dictionary/bolster_1