Hi Dexturk ~ welcome.
It says that you live in the Phillipines, so there are going to be cultural differences and possibly misunderstandings, as I am from the UK. However ...
You have been together for a long time, yet she hasn't told her parents about you.
She goes to parties with other boys and lies about it.
You pretend to be her to lie to her friends.
You sleep with another girl who then tells your girlfriend ~ yet your girlfriend is still with you.
You are threatening to take up smoking!!
This is a relationship with little or no trust, yet where both of you return to each other. I don't undertstand it at all.
Threatening to start smoking is a little immature, I would say.
Try to talk this out maturely ~ if you can
