You have an interesting dilemma - on the one hand you are happily single, on the other hand you are experiencing pressure from others (and perhaps within yourself as well) to find a partner. When we operate from the idea that we ‘should’ do something, it's more likely we'll then second-guess or over-ride our internal sense of what is right for us
However, I would suggest that listening to our inner voice is different from relying on emotional reactions as a guide to action. It could perhaps be better described as a combination of noticing our internal responses over a period of time, rather than reaching a quick conclusion (in other words, emotions and cognitive processes work together to determine the best thing to do). For example, I meet a man who seems awkward and uninteresting, but when I move beyond my initial disappointment about how he is coming across, my inner voice tells me to give myself more time to get to know him before making a decision.
Alternatively, I meet someone who seems sexy and exciting, my emotions tell me he is ‘the one’, we date a few times, then I discover that he does not manage his anger well. My inner guide listens to all the evidence (I am attracted to him, he's fun to be with, but I don't like the way he treats me when he's angry). I may decide to proceed with caution, and to let him know that he needs to manage his anger differently if we are to have a chance together. Alternatively, I may decide that his aggressive behaviour is a deal-breaker. Only you can decide what is right for you.
In summary, my suggestion is you combine your friends' advice with using your gut instinct - widen your definition of ‘following your inner voice’ to include strategies like taking time, continuing to use new information to make decisions about whether someone is right for you based on how you think as well as what you feel.
Some of the most successful relationships I know have started as friendship - sometimes for years before people have made the decision to become a couple. In many ways these relationships have the strongest foundation of shared values and experiences.
Remember though, It's also OK to be single and to enjoy it too! If you prefer to remain that way for now, and you are at a time in your life where relationships are purely casual and you're not in a hurry to settle down and lose the lifestyle you have now, there's nothing wrong with that.