"Very" is usually used as an intensifying adverb. It adds strength to an adjective or another adverb. "Too" implies "excessively" when used this way: "You love him" = + "You love him very much" = ++++ "You love him too much" = ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ (The degree to which you love him is excessive and inappropriate)

Have a look at the following examples; the tea was too hot to drink, so i put it aside to cool. The tea was very hot but i drank it. The bag was too heavy to carry upstairs, so i waited for the lift to descend. the bag was very heavy, however i managed to carry it upstairs. His English is very good Vs His English is too good for Intrmediate class. Too means more that what is needed while Very is just an emphatic adjective.