How does the church view me? - As a sinner as She see’s us all as sinners. Sexual orientations does not change that.
What are my options? – If you act on those sexual desires, then go to Confession. That’s your option, Penance.
What is the Catholic standpoint? – I don’t know if you persist to get notoriety and attention to bi-sexualism. Why should it? I think alcoholics should get more attention, or drug addicts. Because, those people are crippled far more than someone with a sexual lifestyle. Bi-sexual is nothing new. And it’s not anything great. In fact, dim lit is the bulb, since there’s nothing of fidelity to a relationship to someone for espousalship of having children one day. Rather, it’s a sexual lifestyle defaced from the real merit and institution of marriage, which is the Sacrament of the Family, between one man and one woman.
Can I be a practicing Catholic and be bisexual? – Can you be a practicing Catholic and still a sinner? Yes. Again, we all are. There’s no exemption. All fall short of the glory of Christ. But if you persist with your question. Then here is your answer: You act on bi-sexual desires (this has nothing to do with marrying a woman and having children), since your question isolates to merely sexual orientation. Thus, acting on sex outside of marriage for which you give children new life, is a sin. Thus, you act on your sin is against your Faith as a Catholic. It’s against the Sacraments of the Church. You would be a Catholic in contradiction, a conflict.
Can I be Catholic and be an advocate for the LGBTQ+ community? - Not really. If you are advocating the lifestyle, you then stipulate to honor and extend people to live out that lifestyle. Which is sexual. Thus, acting upon those desires. Which is a sin. Therefore, if you advocate acting sexual (which again is outside of marriage between a man and a woman), you therefore are in contradiction to the Church.
Should I be “out” in my local church? - By “out’, you are inviting others into your lifestyle? Should drug addicts be “out” inviting others to do the same? Thus, answer is quite eloquently: No.
Is having attraction to both men and women sinful? - Your attraction is sexual, and is the inclination referred to as “lust.” And thus, it’s a sinful inclination. To act on those inclinations of sexual desires, is a sin.
Should I mention this during confession? – If you are repentant. Sure. But if you are not repentant, then you would be lying to the priest and to Christ.
Can I have LGBTQ+ friends? I can have alcoholic friends, and those who are drug addicts. Thus, I believe you can have friends of whatever degree or merit of sinful approbation one bears in life. Hence, all people are sinners. And so are all friends. Except for Mary the Holy Mother of God. And Jesus, Her Son, Our Lord, Who was slain for our Salvation due to our sins.