This shows his accountability and honesty.
Friar Lawrence is not to blame. He is not perfect; like everyone else he is only human. Friar Lawrence proves to be responsible and honest. His intentions are honourable; he did not intend for anything to go wrong. He reacts quickly to problems he encounters and the plans that did not work out were not his wrongdoings. Often in life things take a turn for the worst whether you like it or not, but it is all in the original intentions. If all was meant to have a positive outcome