You show interest by being useful to somebody
Your taste is Virgo-fine and it is spent on romance and on making things, so your flirting looks like help. You fix the thing, notice what they needed, remember the detail from three weeks ago, and hope the pattern will be read correctly.
Sometimes it is. Often the person concludes that you are simply a considerate individual, since nothing in your behaviour distinguishes interest from ordinary decency. That gap has cost you more possibilities than any amount of shyness has.
Reserved in a way that reads as uninterested
You hold back at exactly the moment when something needs to be said, out of a reluctance to presume and a dislike of anything overblown. From outside this looks like indifference. One plain sentence, however plainly delivered, is enough: you do not need to become effusive, only unambiguous, and the two are entirely different requirements.
Craft rather than flourish
Whatever you make is well made: the joint fits, the sentence works, the technique has been learned properly. You are unimpressed by talent without discipline and rightly so. Take more risks with the material anyway, since your work is technically excellent and occasionally so careful that nothing surprising has been allowed to happen in it.
Pleasure that has to be scheduled
Enjoyment does not happen spontaneously for you; there is always something that should be done first, and the list never empties. Put the enjoyable thing in the calendar as a fixed appointment with the same weight as an obligation. Treated as optional it will be displaced permanently, and you have proved that to yourself many times.
With children, you teach them how it works
Around children you explain properly, show them the actual method, and take their questions seriously rather than fobbing them off. Children get something rare from you: an adult who assumes they can understand. Add plain praise to it, since your instinct is to offer the correction along with the encouragement, and only one of those was needed.
State the interest; the service is not a signal
Everything you do to show affection can be explained away as helpfulness, which means the other person has no evidence at all. That is not their failure of perception. Say it directly once, and accept the discomfort of the ten seconds involved, because the alternative is a pattern you have already run several times to no result.
Rest is not idleness, whatever it feels like
You will work through a body that is asking for a stop, because stopping feels like a failure of duty rather than a requirement. The result is a slow depletion that nobody around you notices, including you. Treat recovery as one of the tasks on the list, entered properly, since it is the only category you reliably act on.
Creative work with a technical spine
Where making meets precision is where you flourish: editing, design, restoration, instrument-making, anything where craft is judged by people who know the difference. Purely expressive work leaves you uneasy and purely mechanical work leaves you bored. Look for the version with a standard in it, since a field with no standard gives you nothing to be excellent against.
The parent who explains rather than decrees
With children you give reasons, which is respectful and produces thoughtful people. It also means every rule is open to negotiation and you will be argued with in detail. Keep two or three that are simply not up for discussion, since a household in which everything must be justified is exhausting for the person doing the justifying.
Fun on your own terms, not theirs
You have spent evenings doing things you do not enjoy because that was what everybody else called a good time. Your version, smaller, more purposeful, involving something being made or learned, is entirely legitimate. Propose it. A surprising number of people are relieved to be offered an alternative to the standard arrangement.