The Italian word "troppo", usually used in the phrase "non troppo", not too much. Allegro non troppo, for example.
The word is obsess. It means to think too much about something.
The word is Boastful
Brag, boast
a little I do not think that there is a single word in English that means, specifically, not too much. "Adequate", "satisfactory", "sufficient" and "enough" mean… enough. "Inadequate", "unsatisfactory" and "insufficient" mean "not enough". At a pinch, you could use "satisfactory". Otherwise… "not too much", "not excessive", "not overdone"… .
Verbose, long-winded, rambling
sloppy disheveled
Diabetes is a medical condition where you have high sugar levels.If you have too much sugar...you just say "too much sugar"In spanish you say "Empalagoso"
I think the term you want is narcissism.
"Stress out"? That's not really much of a word, more of a phrase. "Stressing out" means when your put under too much pressure or stress than you can bare.
The word "too" is different from the word "to" and "two" . The meaning of "too" would mean also. It could also mean "too" much. These are some examples: It's too hot! or Can I come too?
Trop means too much or too many.
makes Jack a dull boy is an idiom... Sorry if it's no help