If you’re actually “bi” then that means you also have attraction to the opposite gender. In that case,you should be able to simply set the same-sex attraction part of you aside and focus on the opposite-sex attraction part of you.
Many if not most of us have experienced some type of “forbidden” sexual attraction in our life, whether the attraction was to a person of the same sex, a person married to another, a teenager under 18 when we were older, a priest, a religious sister etc. It’s also pretty common for people to have a couple of same-sex crushes in their life, especially when they are young. Just accept that any type of sex or relationship cannot happen, put it out of your mind, and move on.
If most or all of your attraction is only to the same gender and very little or none for the opposite gender, then that is more of a concern because it indicates you may actually not be bi, but gay. In that case you probably should talk to your priest.