Place a piece of furniture in front of the window that is the same size or larger as the window opening.

Nitesh it will be good if you throw some more light on your taste and preferences . also pic and dimensions of your current room wid window and door positioning and dimensions : ) . don't forget the budget.

No, its not suggestive unless and until your get the seepage repaired. If its not repaired and tiled then the seepage will get diverted to some other wall .

that's right. a column like this is not a handicap at all. it's not too deep, so it does not take up much space. As kalatmak space has suggested, one of its uses would be to place a cove light. you can also extend a shallow shelf of the same depth above the bed to place tiny led lights below it and light up the wall behind. then you can also do a false wall extension behind to place the bed against it and create a little niche above the bed head. you could paint that niche in a different colour