<human>: Male, 25. Been attracted to both guys and girls my whole life. I sorta denied the homosexual urges early on, determined to hide my hookups from my friends and family. This line of thinking has continued until this day. I have had many hetero relationships and have a current girlfriend I've been with for ~2 years.

I am just so confused. Sometimes I feel like I am more deeply sexually attracted to men than women BUT feel like I wouldn't want a relationship with a man. It is a difficult concept to come to terms with. These questions swirling around my head have created a problem with performance in the bedroom with my GF as well. Not getting it up makes me feel like perhaps I should be with a man instead. I am only out to my current girlfriend. I just don't know how to handle my urges and desires. I feel like maybe I need to experience life out as a bisexual before getting really serious with the current GF to be sure of what I want. At the same time I love her and am terrified of losing her. 

Not only that, I am extremely worried about getting back into the dating scene with both girls and guys and continuing to have erectile problems. If you've had a similar problem you know that this line of thinking is extremely counterproductive towards overcoming it.

Sorry for the rant. I just need advice and perspective. Thanks friends.

Can you summarize the given text in a few sentences?
<bot>: Bisexual questioning is messing with my sex/love life, how can I be sure about my future with my longterm girlfriend?