You’re using gmail, you’re already screwed, might as well get laid too. But seriously, look into alias providers like simplelogin and anonaddy, it works for this use case and can smooth the transition away from gmail in the future. At the end of the day you need to make contact with potentials so it can’t be truly private, plus they’ll be mining your data, combining it with facebook shadow profiles etc, it’s technically quite plausible to identify you from that alone. VoIP, aliases and so forth are band-aids. At the end of the day you need to make a choice, is the potential of finding someone worth more than some of your privacy ? Or…
Consider local hobby groups, hiking, meet-ups and so forth. The so called ‘Third Place’ (other than work and home) is on it’s last legs, but it’s not dead and will hopefully see a resurgence, find and partake in one. Put yourself out there.