Do You Think You've messed up too much for God to Accept You.....No!

John  3:16
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.

All you need to do is accept him, Jesus said in word:

John  10:9
 I am the door: by me if any man enter in, he shall be saved, and shall go in and out, and find pasture.