You shouldn’t be feeling guilty, my friend. Christianity is about living a ‘back of the queue’ lifestyle and always trying to put the needs of others before ourselves.
It’s also an acknowledgment that we are imperfect beings and will always fall short of expectations. But this shouldn’t stop us trying anyway.
At the core is a forgiveness of others but perhaps most importantly a forgiveness of ourselves. To feel constantly guilty is to not take this important step. This is not an ignorance of our transgressions, but an acceptance of them and a promise to try harder next time.