I need tips on how to die less.
Hi there
I've been playing League for about 4 months now. Recently (about a month ago) I started playing ranked because my friends wanted me to. While I enjoyed normal games more, I gave it a shot anyways. Went 4-6 in placement matches and got into Silver 5. This came as a shocker to my friends who are still around bronze 2/3 -ish although they were playing way before me.
At first I thought I was a "better" player than my friends. Boy was I wrong, check my match history and see how badly I feed the team. Honestly, my "bronze" friends go positive in the normal games we play AND win the game. And here I am, who got lucky in his placement matches and goes 1/9 in games. I'm not the guy who cares about KDA, but they definitely contribute to the game, atleast in low ELOs. I know I can make better plays, but I just don't know how.
I ward, I check mini-map, its just, everyone in the team is so out of position, but the enemy team is always banded together. The enemy team roam and take down towers one by one. Whereas our team scatter about, one getting drake, another going off to farm, another splitpushing. I swear 90% of the games in this ELO is won just by grouping up and having some map awareness. And by no means am I blaming my team. I want to know how to die less. I feel like I'm trying to save my team mates by assisting them, but if I try to help, I get killed too (as I said, the enemies group up, we don't). And even though this is "soloQ" it IS a team effort. But I feel like I'm overprotective of everyone, thus in the end I die when I try to help them, and they die as well :(
TL;DR: Please look at my score, builds, runes, masteries and criticize me and tell me how should I improve and die less in games. I see many players carrying themselves out of low ELOs with less than 5 deaths. Me on the other hand, a failure. 
I would also like if some ppl added me, maybe you can see where I go right/wrong in my gameplays. I need help.