Do guys try to make girls jealous?

Ok,Ive liked the same guy for going on 5 years.
Never told him how I felt.
But I know for a fact that he likes/liked me.
And here lately Ive been catching him looking at me,but he has a girlfriend.
Please dont go into the whole,"he's a cheater" thing. [hes not like that]
I think he still has feelings for me though,cuz like I said,Ive caught him looking at me quite a few times.
And whenever Im near his girlfriend and him,he trys to like,be all lovey dovey with her.
Do you think hes trying to make me mad and make me leave him alone,or do you think hes trying to make me jealous to see how I act?
[Cuz he trys making eye contact with me whenever hes with her,but one time he caught me flirting with a guy friend of mine,and he kept looking at me and my guy friend]
So please tell me what you think. =]

TRYING TO MAKE YAH JEALOUS!! hehe..i think he is

yes they do

yeah

Yes, but what if he's trying to make her jealous?

He wouldn't try and make you jealous unless he was jealous of you for some reason.

he could just be into both of you if you are both pretty. it could happen.

i think you need more than looks and glances to go on... those looks could mean anything, could mean something about you or could be something completely different. i also think that everyone deserves someone who wants them as their number one.

i think you should find someone who only has eyes for you! i want someone who only has eyes for me and me only! why do guys insist on flirting anyway, i think they dont really care that they are actually hurting us when they flirt! good luck sweetie! :)