She is just being friendly in public because she does not want to offend you and she treats you like any other friend.
1	She	she	PRON	PRP	Case=Nom|Gender=Fem|Number=Sing|Person=3|PronType=Prs	5	nsubj	5:nsubj	_
2	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	aux	5:aux	_
3	just	just	ADV	RB	_	5	advmod	5:advmod	_
4	being	be	AUX	VBG	VerbForm=Ger	5	cop	5:cop	_
5	friendly	friendly	ADJ	JJ	Degree=Pos	0	root	0:root	_
6	in	in	ADP	IN	_	7	case	7:case	_
7	public	public	ADJ	JJ	Degree=Pos	5	obl	5:obl:in	_
8	because	because	SCONJ	IN	_	12	mark	12:mark	_
9	she	she	PRON	PRP	Case=Nom|Gender=Fem|Number=Sing|Person=3|PronType=Prs	12	nsubj	12:nsubj|14:nsubj:xsubj	_
10	does	do	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	12	aux	12:aux	_
11	not	not	PART	RB	_	12	advmod	12:advmod	_
12	want	want	VERB	VB	VerbForm=Inf	5	advcl	5:advcl:because	_
13	to	to	PART	TO	_	14	mark	14:mark	_
14	offend	offend	VERB	VB	VerbForm=Inf	12	xcomp	12:xcomp	_
15	you	you	PRON	PRP	Case=Acc|Person=2|PronType=Prs	14	obj	14:obj	_
16	and	and	CCONJ	CC	_	18	cc	18:cc	_
17	she	she	PRON	PRP	Case=Nom|Gender=Fem|Number=Sing|Person=3|PronType=Prs	18	nsubj	18:nsubj	_
18	treats	treat	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	5	conj	5:conj:and	_
19	you	you	PRON	PRP	Case=Acc|Person=2|PronType=Prs	18	obj	18:obj	_
20	like	like	ADP	IN	_	23	case	23:case	_
21	any	any	DET	DT	_	23	det	23:det	_
22	other	other	ADJ	JJ	Degree=Pos	23	amod	23:amod	_
23	friend	friend	NOUN	NN	Number=Sing	18	obl	18:obl:like	SpaceAfter=No
24	.	.	PUNCT	.	_	5	punct	5:punct	_
