I was plat 5 s5 and got a new account,
Why did you get a new account?
my normal mmr is challenger/master but after going 8-2 i was placed in bronze 2
I was Diamond 4 last season. Went 7-3 this season, was Placed Plat 2.
Because you are NOWHERE near Master/Challenger Elo. Also, Normal MMR and Ranked MMR are two different ladders.
if i don't carry it is a for sure loss
You are not a point of carrying games. You may win a lane but you are unable to transfer your personal skill into team fights. This is where your skill lacks.
Finish games as soon as possible. Utilize your personal advantage in a lane into early turrets/team fights.
I duo'd with a silver friend of mine and was told that that could be the problem
Doesn't harm your personal MMR. Game still judges you by the way you play.
However, your silver Friend may bring Bronze boosted accounts into your games and this is where you'll start to suffer.
Make sure he is capable, don't carry the dead weight.
If anyone has any suggestions or answers I would really appreciate some advice on what lane to carry best in.
Top. Absolutely. Too many players are unable to push early Turret or Utilize their Teleport correctly.
If you want easy games. Have an excellent support and Top, the rest is GG.