Hey, I need tips to not get tilted

Ok I got tilted so hard over the course of 3 games, and here is why:

Game 1: I'm playing morde top(3rd time morde) Mediocre game, until I get a quadra and enemy team surrenders while saying mordekaiser... I think I won the game for my team

Game 2: I'm playing morde top(now with hopes and dreams of carrying my team) I'm feeling pretty pumped The enemy team is weird. No top laner, 2 adcs. Jinx and cait Caitlyn is top... RIP She kills me 2 times in 5 min She got 1st blood by kiting me to my death (literally) She killed me again under my turret I can't hit her, but she can hit me. RIP hopes and dreams I abandon lane by sheer frustration, and go bot, I get our blitz to go top He is RIP too She gets free cs, kills, and 1st turret, so she is fed and 1 shots my team We lose completely Oh, and I'm a cait main, sooooo yea.

Game 3: I'm playing cait top(with a tilt level of over 9000) there is one little problem although Some one else called top I'm too tilted to think, so we have 2 top. Umm yea I get flamed hard and told to go bot I'm too tilted to say yes RIP BOT LANE RIP TOP LANE I end up getting the best score(because cait top is so cheap and mean) However, we just lost (it was close) Yet I still am very tilted

Any tips on how to not get titled?