You should keep away from your friend especially if she is trying to convert you to Shiaism. The difference between us Muslims and Shias is in Tawheed - In the belief of Allah. Shias believe Allahs name and attributes can be Manifested through the Blood Line which they call "Imamaats". According to them the Holy Blood Line carries Allahs attributes like All-knowing, All-Seeing, etc. And they attribute this "Holy Blood" Line to the Prophets Family through Ali and Fatima. They believe in Shirk and the worship of Imams and Saints since they believe they are holy.
Assalamu Allaicum wa rahmatullah wa barakatuhu
Dear sister "HappyMuslimah" before learning about wrong teachings of some sects that unfortunately exist today, you should first try to learn as much as you can about the right message of Islam according to Quran and Sunnah, do as much as reading you can becouse on that way Inshallah you will be able to pass your knowledge on everyone who asks you a question regarding it and you will be able to correct their mistakes, in this case to corect the knowledge that your sister friend has.
The reason why I have quoted the post of brother Salem is his advice of "keeping away from your friend". MashaAllah his intentions are only for the sake of good and sometimes there are situations when one after hard working and even with still strong wish to help has no other option but to "turn away" . But before doing that I want to remaind us which are our duties as Muslims toward eachothers and to share more on this subject.
We all know that as Ummah we have responsability toward eachothers, what means that our duty is to help, guide eachothers and to be patient on that way as we will face many obstacles, sometimes we will think on giving up but we must not forget when Allah sais in Quran
:"And believers are helpers to each others".
Why our Ummah, which is like one body, society of Muslims is so much important, sometimes maybe even more important then individual about what are witnesseing words of Allah when He sais:
"You are the best of all the people who have ever appeared( ...)".
The verse is proof that the Islamic Ummah is absolutely the most valuable of all Ummahs. The first and last generations of this Ummah are together involved in this qualification, although the Companions (companions of our Prophet Muhammad s.a.w.s have the advantage over other members of the Ummah. Allah has made this Ummah most useful to people as He is ordereing us well, rejecting the evil and fighting against it.
We can not and must not turn away from the one who is in need of us before offering him our help, our hand and before asking Allah to help us in guideing the one who is on the wrong path.
Prophet Mohammad s.a.w.s. said: "The best man is the one that is most useful to people, and the worst man is one who is most harmful to people."
Prophet Mohammed s.a.w.s. also said :
"When one of you sees wrong deed change it with hand, if you can not then change it with your tongue, and if you can not change it even with tongue, then with your heart, and this is the weakest of iman."
Allah sais in Quran
:"...but help ye one another unto righteousness and pious duty. Help not one another unto sin and transgression, but keep your duty to Allah..." (Al Maeda, 2).
Doing good means adviceing other to do the same, makeing easier the way that leads to good and supressing wrong deeds and enmity as much as one can.
Therefore, believers should order good, alienate themselves from evil and do not forget on themselves and their deeds.
Allah sais in Quran :"And the believers, men and women, are protecting friends one of another; they enjoin the right and forbid the wrong.." (Al Tawba 71), so that believers are described as those who ordereing good and forbideing evil.
When one of us wants to order good he should strengthen the patience and hope for Allah's reward. A person who is confident of Allah's reward will not feel the pain, the insults and inconveniences that may come to him from the one to who he commands good.
May Allah guide us all.Ameen
Wa allaicumu Sallam wa rahamtullah wa barakatuhu