Whether he is trying again or not, you can guess it by his routine.
He will not hurry to be in a new relationship.
He will be in contact with you.
He will come across you showing that it was accidentally.
He will discuss with you and your common friends about his relationship with you.
He will show his apologies through different gestures.
If he is trying his best, he will even come with midnight drunk calls in a tragic poetic tone.