When sex enters a relationship everything changes and your thinking is going to be challenged for 6 months to a year. Don't trust your thoughts during this period. Don't make any big decisions together. If you get to two red flags, again, BOLT.
You've got to keep going. Your partner is out there. You've got to stay true to your path, true to your goals and boundaries, and give each person the flexibility to show up in your life and be a YES.
Today's dating apps are both good and bad. They are potentially a gateway to meeting tons of available and active dating partners. But they are also a distraction from actually doing what you need to do to find a long-term relationship.
If the chemistry is on and flowing both ways, you will both be asking "What's next." If it's not mutual, move on. You will not be able to build a fire without initial sparks. (But don't overlook the slow-burn. If you're "sort of" interested, perhaps a second date is in order.)