Even if he hadn't been my best friend, I should at least have empathized.
1	Even	even	ADV	RB	_	9	advmod	9:advmod	Discourse=contingency-condition:63->64:0
2	if	if	SCONJ	IN	_	9	mark	9:mark	_
3	he	he	PRON	PRP	Case=Nom|Gender=Masc|Number=Sing|Person=3|PronType=Prs	9	nsubj	9:nsubj	Entity=(14-person-giv:inact-cf2-1-ana)
4-5	hadn't	_	_	_	_	_	_	_	_
4	had	have	AUX	VBD	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	9	aux	9:aux	_
5	n't	not	PART	RB	Polarity=Neg	9	advmod	9:advmod	_
6	been	be	AUX	VBN	Tense=Past|VerbForm=Part	9	cop	9:cop	_
7	my	my	PRON	PRP$	Case=Gen|Number=Sing|Person=1|Poss=Yes|PronType=Prs	9	nmod:poss	9:nmod:poss	Entity=(14-person-giv:act-cf2-3-coref(13-person-giv:inact-cf1-1-ana)
8	best	good	ADJ	JJS	Degree=Sup	9	amod	9:amod	_
9	friend	friend	NOUN	NN	Number=Sing	16	advcl	16:advcl:if	Entity=14)|SpaceAfter=No
10	,	,	PUNCT	,	_	9	punct	9:punct	_
11	I	I	PRON	PRP	Case=Nom|Number=Sing|Person=1|PronType=Prs	16	nsubj	16:nsubj	Discourse=explanation-justify:64->62:0|Entity=(13-person-giv:act-cf1-1-ana)
12	should	should	AUX	MD	VerbForm=Fin	16	aux	16:aux	_
13	at	at	ADV	IN	_	16	advmod	16:advmod	_
14	least	least	ADV	RBS	Degree=Sup	13	fixed	13:fixed	_
15	have	have	AUX	VB	VerbForm=Inf	16	aux	16:aux	_
16	empathized	empathize	VERB	VBN	Tense=Past|VerbForm=Part	0	root	0:root	SpaceAfter=No
17	.	.	PUNCT	.	_	16	punct	16:punct	_
