Annoying boyfriend's sister

I been in a relationship with my boyfriend for about 2 years, our relationship has not been smooth. My boyfriend has his own mind-set, stubborn and his behaviour is towards one of the extreme side. For example, he can be very nice and generous to almost everyone (even people who is not his friends) he can offer a ride home to a stranger that is walking along express way. As long your name is not in his blacklist, he can offer his help to the people around him. My parents was happy when we first get together as my mom feels that my boyfriend is older and would be mature enough to take good care of me. But ever since my boyfriend try to teach my mom how to handle her kids (meaning my brother and I), my mom started to dislike him. She feel that my boyfriend does not respect her and since then they don’t really talk much. As for my boyfriend, whenever I ask him to come over to my house or walk me to my door he will reject me or give me excuses that he need to be in the car. I try to bond them, provide a chance to talk or make my mom have a better impression on him. But to my boyfriend, I feel that he does not want to make effort towards building a better relationship with my mom. My boyfriend got an older sister (not real sibling), she kind of irritate me and in the end my boyfriend and I often got into small quarrels. She is married and have four kids, there is a period when my boyfriend was unemployed. She would call my boyfriend up for breakfast, to help her fetch her kids and to bring them out for shopping. His sister also like to buy branded clothing for my boyfriend, buy food and stuff for him. My boyfriend is someone who do not eat breakfast and dislike shopping but whenever his sister call, he would just go with them to eat and even shopping. There is two incident that make me feel unhappy, first one is one of the morning his sister forget to bring her house key and was locked outside her own house. She Watsapps to my boyfriend and tell him that she was locked out from her own house and my boyfriend rush over to her house. To me, what can my boyfriend do by rushing over, she actually can call her husband up to pass her the keys. When my boyfriend reached, her husband also came back to pass her the house key. Second incident, my boyfriend has given her kids his Xbox 360 for them to play during their holiday. One day, her kid call up say the Xbox was spoilt and could not on the console. He went over to test the console and bring it for repair, it was beyond repair and he bought them a new one and went over to fix it up for them. (My boyfriend was not employed at that time) I was unhappy, why he spend this kind of money when he did not even have enough to pay his car instalment and petrol. In my heart, I feel unhappy and unfair. I did not ask him to spend money on me, we save and eat simple meals. I save up for our future, I did not go to restaurant to eat, I did not ask him to buy me a present on my birthday/anniversary, we did not even go out for any celebration on special occasion. When I talk to him about his sister, he feel that I am biases as I did not like his sister. So whenever we touch on the issue of his sister, he tends to flare up at me. I feel when he talk to others he is more interested and did not get angry for small things but when it comes to me a miscommunication of the meeting place he flare up and scold me why I made this kind of mistake. I really do not know if it is really my problem that cause us to quarrel or am I too controlling. I feel lost and lonely, there is no one that I can talk with. I do not know if I should continue on in this relationship. What should I do???

You really need to be on the same level as your BF. It's obvious that your values are different to his, hence his issues with your Mom. You've listed enough reasons here to make your relationship unhappy without his annoying sister issues. It just demonstrates his behavior again to his family where it's plain to see that they come first before you. Only you can answer if you want to continue to be put second.

To:Manalone So are you able to accept this kind of relationship being continue to be put second by your other half? I do not mind all those small little reason like he did not buy a present for me and did not go for celebration on special occasion etc. What make me un-happy is the way he react to my invitation to my house (anything related to my family) and his behaviour towards his so call "sister" (not real sibling). Family is important to me and I would treat his family the same as my own. Maybe I just could not accept or trust his so call "sister" as she has always been secretive over things related to my boyfriend.

To:Manalone One more thing is he does not treat his own family the way he treat his "Sister" family.

Well if you put it that way about 'sister' then you're implying a whole new 'can of worms'. My point is that a true relationship has no lopsidedness about it...it flows in balance between 2 people. Regardless if you suspect there's something 'sinister' about his 'sister', the fact is that you're unhappy about your relationship with your BF because of his treatment towards you and your family..... and that's why your here on this forum. And only you can decide whether you want to continue to put up with it.