Girls, How to get my boyfriend give me a title and buy me more expensive gifts?

Anonymous
I have been dating with my current boyfriend for 5 years. We are both 28 at this time. Our parents and friends know and support our relationship. We are living together and share the bills equally. Although I am JUST his girlfriend, I do all duties of a wife such as cooking, doing laundry, and also buying gifts for our families and relatives on holidays. We split the costs but I do all the thinkings.
Our family are not rich like millionaires but we can afford buying designer brands occasionally. I am employed but he has no income because he is a full time student.

My concerns:
a. Most of our friends already get married and have kids. They keep asking us about ours. He said we would after he graduated and got a stable income. But that will be 3 years from now and there is no guarantee that he will get married with me. In our culture, having a title in a relationship is important especially when we have sex before marriage and everyone knows we live together. My friend suggested me to tell him about performing a formal tradition between 2 families to announce that I am his-wife-to-be. I told him about this idea couple times and he hesitated of doing it. He is committed in our relationship but he is not ready for giving me a title.

Should I push him for this? Should I be angry if he doesn't want to give me a title?

b. He never buys me expensive gifts that cost more than $200. He does not spend much for himself neither. I feel jealous when his sister (a hooker) receives LV, Gucci, etc. from her short-term boyfriends from time to time. She is not committed to anyone but she can receive expensive gifts from people. She also asks her parents (my boyfriend's parents) for her own expenses. I asked my boyfriend to buy me a LV bag (<$2000) and he told me to wait until he gets income. But that will be 3 years from now! And who knows if we are still together until that time?

Should I push him to buy me expensive gifts? Should I be angry if he doesn't?
Girls, How to get my boyfriend give me a title and buy me more expensive gifts?
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