Your so cute Lucinda, Your so honest with your feelings and how you perceive things its very refreshing. As to your questions bout being Mennonite? Would you rather worry more that you are one of those or more so to be the reflection of our Lord and Savior Jesus Christ? Stick with the later and you will never lose. So many put more importance upon their affiliation than their relationship and devotion to the One true God.
Eph 4:3 Endeavouring to keep the unity of the Spirit in the bond of peace.
Eph 4:4 There is one body, and one Spirit, even as ye are called in one hope of your calling;
Eph 4:5 One Lord, one faith, one baptism,
Eph 4:6 One God and Father of all, who is above all, and through all, and in you all.

Joh_14:6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.

Our focus only need be these, Lest we get caught up in the pride that over took the Pharisee’s, where their affiliation and position were more important than God himself, missing all that truly is important, and all common sense lost. Like healing on the Sabbath or saving an animal on the Sabbath for a couple of examples. They then added more traditions, and services to God’s plan.

Mar 7:5 Then the Pharisees and scribes asked him, Why walk not thy disciples according to the tradition of the elders, but eat bread with unwashen hands?
Mar 7:6 He answered and said unto them, Well hath Esaias prophesied of you hypocrites, as it is written, This people honoureth me with their lips, but their heart is far from me.
Mar 7:7 Howbeit in vain do they worship me, teaching for doctrines the commandments of men.
Mar 7:8 For laying aside the commandment of God, ye hold the tradition of men, as the washing of pots and cups: and many other such like things ye do.
Mar 7:9 And he said unto them, Full well ye reject the commandment of God, that ye may keep your own tradition.

Sorry I am a stickler for scripture, but I know of no other authority to look to.