my short term goal

PLEASE ANSWER AS MANY AS POSSIBLE WITH THE INFO IVE SUPPLIED SO I DONT HAVE TO DO MULTIPLE POSTS!!! THANKS AND MUCH LOVE!
 
been lifting :14 months- 6 months was slacking , 5 months mostly serious , the rest very serious
 
start weight : 145-150lbs( the year before i started lifting i went down from 140 to 120 because of stress causing me to eat nearly nothing for almost a year, then starting eating anything and everything to put weight back on which may be the cause of some of my B.F AND STRETCH MARKS)
current weight : 175-180lbs
body fat % : unknown , not too high , i would say im above 10% but not much more im guessing but im not fat , im just bulky!
height 5'11-6'0 feet
diet : poor , mostly junk , lots of carbs
supplements : monster maxx(weight gainer) 1500 cal , 85g of protein , 215 g carbs / 2 shakes
 
 
long term goal : to be a cut 190-200lbs( not sure what to bulk to in order to cut to that weight?)
short term goal:
im going to vegas  at the end of august   and i want some more definition! . i  usually do  reps 8-10 for size gain and once in awhile heavy 4-6 to gain some strength for a couple weeks. which has caused me to be bulky  which hahahah is ok cuz im "bulking" when i go to vegas i wanna look more defined and good  my friends no i have been lifting for a year and have never seen me shirtless since , i dont wanna look chunky .i want to get those abs showing through , i need to lower my body fat alittle , but dont want to cut by cardio because i dont want to loose any muscle mass and i intend on continuing to bulk until next spring. so i was wondering if i clean up my diet realllly good , no junk what so ever ... besides the occasional ice tea or pop.  and maybe 4-5 weeks before i go i switch reps to 12-15 to tone up will this do it?????
 
 
other annoying problems that i could use advice on : i have bad stretch marks , most people seem to get them  between there shoulder and chest , i have mine right on top of my biceps and they look gross , im not even big and they seem to keep coming . im almost afraid  to get any bigger!? anything i can do about it?
 
also my shoulder lag so much , narrow shoulders run in the family and i want big defined shoudlers ,  my bis tris and getting big altho not defined enough to make me happy , but if i get my shoulders big will it make my bis and tris pop more??????????? cuz my arms look big , but have no shoulders , so its almost like i just have fat arms!? right where my shoulders and bis meet theres a tiny layer or whats either flab or water which i wanna get rid of :S im so frustrated! so my arms are bulky , if they were ripped at the size they are now id be happy , how do i lose that tiny layer of fat/water , .
 
when i get home fromt he gym and im pumped u can tell i work out ( im bulky remember) but when im not , i almost looked flabby , if i could stay pumped id look rgeat all the time i mean u can see alittle def in my muscles so i know its muscle with a thin layer of flab .. i have love handles  which drive me nuts. i need my pecs to pop and love handles to leave , can this be handled through diet? without cardio cutting?
 
 
 
 
 

ok maybe i rambled too much.
with the stats given , can i achieve toning without sacrificing any muscle   by just changing my diet( still the amount of calories needed to gain but from healthier foods) and rep ranges to 12-15 , instead of cardio with two months time?