For the first one, Romeo is trying to say that love is all different things, it can be happy, lonely, exciting, and sad. But that he wants that and yet believes he won't ever find it.
Explanation: I do not know about the second one, sorry. Hope this helped tho! :)
Flabbergast means that you are shocked for example "I am flabbergasted". It relates to weary and hesitant because those two words relate to being shocked.
