Vegetarian Convert!

I've been ovo-lacto vegetarian for 44+ years. There's nothing wrong with fake meats or protein bars/powders, but I personally don't mostly find them tasty or satisfying, so almost never eat them. At 5'5", I target 100g minimum protein daily, and usually exceed it. I do eat a good bit of dairy: My Northern European heritage brought me the body chemistry to handle it well, and I enjoy it. I don't eat that many eggs, except when traveling, where they're one of the easier ways to get adequate protein at a reasonable calorie level.

My advice to a new vegetarian would be to lose the meat-eater's orientation to getting all your protein from one big protein item per meal ("What's for dinner?" "Chicken"). Of course it's good to include a major protein source when you can: Beans or other legumes, tempeh, tofu, dairy products if those are still on your menu, seitan, etc.

But also think about getting small amounts of additional protein from most foods you eat (your MFP food diary will be a help in this - look for places where you're getting quite a few calories but little protein, then come up with alternatives you enjoy eating that better help you meet your nutritional goals). There are vegetables with more protein, fruits with more protein, grains with more protein, snacks with more protein, etc., compared to alternative foods.

Also, it's a good plan to vary your protein sources, as many vegetarian sources have an incomplete amino acid profile. By choosing varied sources within and across days, you increase the likelihood of combinations creating a more balanced overall amino acid profile. (You can learn more about essential amino acids and complementary food choices if you'd like to be more scientific about it.)

If you're a strict vegetarian (no dairy or eggs), in the long term you'll want to pay attention to getting sufficient B12, calcium, and iron, among other things.

You might want to check out the thread below to identify protein sources you may not have thought of. It has a spreadsheet linked that lists foods by protein efficiency, most protein for fewest calories. You'll have to scroll past the meaty/fishy stuff near the top, but vegetarian sources are there further down.

http://community.myfitnesspal.com/en/discussion/10247171/carbs-and-fats-are-cheap-heres-a-guide-to-getting-your-proteins-worth-fiber-also

Sometimes people become vegetarian thinking it will cause weight loss, or be healthier. Neither of those are inherently true. Any kind of calorie management can yield weight loss, irrespective of food choices. Many ways of eating can be healthy (or the reverse) depending on how much attention is paid to sound nutrition. You've already discovered (based on the remark about boyfriends) that vegetarianism can be a tiny bit socially inconvenient, too. It can also make good nutrition more difficult when traveling, especially in meat-centric cultures, and doubly so where sharing special foods is a deep form of hospitality and social bonding. None of those are insurmountable obstacles, but they're considerations.

If you don't feel 100% committed to vegetarianism - if it's a preference rather than a commitment - it can be fine to be an omnivore who occasionally but rarely eats meat. If that's going to be the actual practical outcome, it would be a good plan to eat a little meat regularly every week or two, as one's microbiome adapts to what one eats over a period of weeks, and it's possible (not guaranteed) that eating meat after a long hiatus can cause minor digestive distress as a consequence.

One more bit of unsolicted advice from an MFP granny type: Don't let boyfriends pull you off something you're truly committed to. It's important to know who you are, and live that out. While some people can be jerks, a guy who wants to redefine you is not someone who truly cares for you as a full person in your own right. (I was married to a hunter for 20+ of those 44 years of vegetarianism and we did fine. The idea of one of us "converting" literally never came up. No, we didn't divorce; I'm a widow.)

Best wishes!