I'm Silver 5

Hi, I'm cav. I've been playing LoL since the end of season three. When trinkets first came out. About two months ago I started ranked. I am very scared of ranked mostly because I spent most of my time playing league with friends and rarely played by myself. I main bot lane and my next strongest role is jungle. Today was another typical day of playing normals with friends, procrastinating my ranked climb to gold. We did two games and both times the enemy teams had high/low plats and the second game a low diamond.

Now I understand that these people could not be playing the roles they used to achieve their high rank and so they are at a disadvantage. That being said I still think for a silver 5 I did fairly good in both of those games.

I guess I'm just posting this to get the forums opinion and a self esteem boost.
Do you think from my performance in these games that I could reach gold 5 if I really put my mind to it and focused on climbing instead of continuously putting it off 'cause I'm scared of ranked?

http://i.gyazo.com/2c5fb9718591ca8527909724925a0d4f.png

http://i.gyazo.com/ecf237c81d2950720f704d9c22fc6ed7.png

Edit: I'd also like to mention I'm not currently stuck in Silver 5. I was placed there after my placements, and have only done a few ranked games. Sitting at I think 51LP at the moment. I'm just scared of ranked and scared to climb.

Edit 2: This is a repost. Since they changed the boards a few days ago I don't know where to post this sort of content anymore and my original thread was removed so I am posting it again. If I posted it in the wrong area yet again it'd be cool if a rioter could tell me where this sort of content would go.