when does it change from 'seeing someone' to being in a relationship?

[clearlynotdownwitthekids]

ive been ' seeing someone' for about 2 months now.
He calls or texts me pretty much everyother day.
We see each other once a week/every 5 days.
Hes sweet, he buys me flowers, we go out, etc....

this is my first relatioship since being divorced and im out of practice.
When does it go from ' seeing someone' into being someones girlfriend?

Last time i had to deal with that we were 19 and my then bf said to me after our second date, ' so, your my girlfriend now, yes?'
seemed so much simplier when we were younger.

My brother, who is younger than me, also told me there is such a thing as ' talking to' someone, which is apparently what you can do before you start seeing someone. which is what you do, before you are going out with someone.....

and my head hurts just tihnking about it. Mind you hes been 'seeing' the same girl for a year and claims she isnt his gf. so i dont know how good his opion is.

and at what stage do you intrtoduce familt and stuff?

2 months hey i would say relationship maybe abit too early to introduce to the family wait another 2 months ,i think your brother sounds like his not serious about his girlfriend or maybe he is waiting for something better to come along i think its an age thing! ahhh your boyfriend sounds like a lovely man good luck

to me (and I am sure I'm not the best advisor on this) that's when you start having sex. Of course, if after that he stays as attentive and caring as before.

Having sex takes it to a higher level (to me, I'm sure lots of people would disagree!)

I think it is when you have agreed that neither of you will date anyone else.