Anon, it’s not okay to date anyone just because you’re lonely, also, if you can’t even think of yourself kissing a woman, I’m pretty sure a relationship won’t end up like how you expect it could go.
Think about this, just because you want to be Bi, doesn’t mean women won’t also reject you, sometimes having lots of options means receiving more rejections.
Plus, there’s the whole issue with the discrimination towards well, the whole LGBT community? So, just because you feel lonely, you might end up going through lots of hardships that can be avoided if you focus on yourself and think properly about what you need to do on your own to better your self-esteem.
Get some internet friends as a beginning if you feel like in real life friends are a chore or impossible. Get a hobby and a nice dildo if you’re feeling lonely. Maybe try one night stands?
Don’t try to “turn” yourself into a lesbian or a bisexual person just because you’re lonely, that will make you feel even more sad and it will make the person next to you also feel like they’re not enough when they’re just dealing with someone who is just lonely.