What should be my new shot choice...goldschlager is now out of the question lol.?

so yeah, whenever i go out and decide to drink more than 2 or 3 drinks (which isn't really that often) it seems like i always end up doing shots of goldschlager with my friend. she parties all of the time, so obviously it takes more for her to get drunk. but the last time we went out it was game over for me. we tried to keep it classy so we started with about a half glass of wine, then a french martini, moved on to a margarita. no shots at this point. got to the next bar and did a shot of goldsclager. then i had a vodka tonic, and before bar close two more shots of goldschlager. mind you, i was sitting down. this is where things started to get reallllly fuzzy. coudn't walk straight, friend had to hold my hand on the way home. got home, fell bc the lights were off when i got back. bf was sleeping, woke up. this is where i blacked out i'm pretty sure. apparently he had to take care of me bc i was puking up the risotto i ate for dinner earlier. when i woke up the next day he told me i was wasted and then i was hung over until approx 7 that evening. now, why did this happen? is that really so much alcohol....or is it just because i am 5'3'' and 120 lbs? why did i get so drunk???? i didn't like it, that's all i know. i would like to go out and drink socially, not get totally wasted. so what should i do if i try to take a shot...something that won't do that again. i also don't get drunk often like i mentioned earlier. .