Some people may have trouble accepting that you are gay, even if you try to be open with them. This can lead to feelings of self-consciousness, which is why it is important to find a support system.
One popular support option is to seek out a gay-affirmative therapist. Though there can be some stigma around seeking therapy, especially in the LGBTQ community, a therapist can help you cope with your existing feelings of loneliness, as well as give you tools for connecting with others.
Another option is to join a group for gay men. While this can seem intimidating at first, groups like the LGBT Center can provide a safe space for you to meet people and talk about your experiences. It can also be a great opportunity to learn how to express your sexuality and to build your confidence.
If you feel you are being pressured by friends or family to not look so gay, consider asking them to respect your identity and not question it. You could also ask them if they have ever experienced homophobia, and what their reaction to that was.
Some people feel the need to appear less gay because they have had negative experiences with homophobia in the past. This is known as "minority stress," and can be very harmful. This can include compulsions to review past interactions and conversations, checking for signs that other people have noticed the person is acting differently than their peers, or seeking reassurances from loved ones that they are not gay.