That's a sign of arrogance, since it is very hard to be a truly good friend to someone who's stuck on themselves.
1-2	That's	_	_	_	_	_	_	_	_
1	That	that	PRON	DT	Number=Sing|PronType=Dem	4	nsubj	4:nsubj	Discourse=evaluation-comment:77->74:2|Entity=(75-event-giv:act-cf1*-1-coref)
2	's	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	cop	4:cop	_
3	a	a	DET	DT	Definite=Ind|PronType=Art	4	det	4:det	_
4	sign	sign	NOUN	NN	Number=Sing	0	root	0:root	_
5	of	of	ADP	IN	_	6	case	6:case	_
6	arrogance	arrogance	NOUN	NN	Number=Sing	4	nmod	4:nmod:of	Entity=(17-abstract-giv:inact-cf3-1-coref)|SpaceAfter=No
7	,	,	PUNCT	,	_	12	punct	12:punct	_
8	since	since	SCONJ	IN	_	12	mark	12:mark	Discourse=explanation-justify:78->77:0
9	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	12	expl	12:expl	Entity=(77-event-new-cf4-1-cata)
10	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	12	cop	12:cop	_
11	very	very	ADV	RB	_	12	advmod	12:advmod	_
12	hard	hard	ADJ	JJ	Degree=Pos	4	advcl	4:advcl:since	_
13	to	to	PART	TO	_	18	mark	18:mark	Entity=(77-event-acc:com-cf4-6-coref
14	be	be	AUX	VB	VerbForm=Inf	18	cop	18:cop	_
15	a	a	DET	DT	Definite=Ind|PronType=Art	18	det	18:det	Entity=(78-person-new-cf5-4-coref
16	truly	truly	ADV	RB	Degree=Pos	17	advmod	17:advmod	_
17	good	good	ADJ	JJ	Degree=Pos	18	amod	18:amod	_
18	friend	friend	NOUN	NN	Number=Sing	12	csubj	12:csubj	Entity=78)
19	to	to	ADP	IN	_	20	case	20:case	_
20	someone	someone	PRON	NN	Number=Sing|PronType=Ind	18	nmod	18:nmod:to|23:nsubj	Entity=(79-person-new-cf2-1-coref
21-22	who's	_	_	_	_	_	_	_	_
21	who	who	PRON	WP	PronType=Rel	23	nsubj	20:ref	Discourse=elaboration-attribute:79->78:0
22	's	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	23	cop	23:cop	_
23	stuck	stuck	ADJ	JJ	Degree=Pos	20	acl:relcl	20:acl:relcl	_
24	on	on	ADP	IN	_	25	case	25:case	_
25	themselves	themselves	PRON	PRP	Case=Acc|Number=Plur|Person=3|PronType=Prs|Reflex=Yes	23	obl	23:obl:on	Entity=(79-person-giv:act-cf2-1-ana)79)77)|SpaceAfter=No
26	.	.	PUNCT	.	_	4	punct	4:punct	_
