Because of too much with 〜あまり
あまり joins a clause containing an excessive action and the clause that results from it.
The first clause conveys a psychological action or state.
The second clause clause is often, but not always, negative.
The clause preceeding あまり may end in a non-past or past verb, or in a noun or adjective followed by の.
Similar grammar in English includes, “because of too much ~” and “so ~ that ~”.
See also
Examples
美少女戦士セーラームーン » Volume 2 » Page 121